Fix Dockerfile style warning - #2814

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [locust](https://locust.io/) ([source](https://togithub.com/locustio/locust)) | `==2.29.1` -> `==2.30.0` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/locust/2.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/locust/2.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/locust/2.29.1/2.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/locust/2.29.1/2.30.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>locustio/locust (locust)</summary>

### [`v2.30.0`](https://togithub.com/locustio/locust/releases/tag/2.30.0)

[Compare Source](https://togithub.com/locustio/locust/compare/2.29.1...2.30.0)

#### What's Changed

-   FastHttpSession: Enable passing json as a positional argument for post() and stop converting response times to int by [@&#8203;tdadela](https://togithub.com/tdadela) in [https://github.com/locustio/locust/pull/2772](https://togithub.com/locustio/locust/pull/2772)
-   Remove Line Chart Default Zoom by [@&#8203;andrewbaldwin44](https://togithub.com/andrewbaldwin44) in [https://github.com/locustio/locust/pull/2774](https://togithub.com/locustio/locust/pull/2774)
-   FastHttpSession requests typing  by [@&#8203;tdadela](https://togithub.com/tdadela) in [https://github.com/locustio/locust/pull/2775](https://togithub.com/locustio/locust/pull/2775)
-   new events for heartbeat and usage monitor by [@&#8203;mgor](https://togithub.com/mgor) in [https://github.com/locustio/locust/pull/2777](https://togithub.com/locustio/locust/pull/2777)
-   dispatch benchmark test improvements by [@&#8203;tdadela](https://togithub.com/tdadela) in [https://github.com/locustio/locust/pull/2780](https://togithub.com/locustio/locust/pull/2780)
-   SequentialTaskSet: Allow weighted tasks and dict in .tasks by [@&#8203;bakhtos](https://togithub.com/bakhtos) in [https://github.com/locustio/locust/pull/2742](https://togithub.com/locustio/locust/pull/2742)
-   Fix StatsEntry docstring by [@&#8203;tdadela](https://togithub.com/tdadela) in [https://github.com/locustio/locust/pull/2784](https://togithub.com/locustio/locust/pull/2784)
-   Implement Poetry build system (mainly so we don't have to commit dynamically generated front end bundles to git) by [@&#8203;mquinnfd](https://togithub.com/mquinnfd) in [https://github.com/locustio/locust/pull/2725](https://togithub.com/locustio/locust/pull/2725)
-   Typing: strict optional in dispatch.py by [@&#8203;tdadela](https://togithub.com/tdadela) in [https://github.com/locustio/locust/pull/2779](https://togithub.com/locustio/locust/pull/2779)
-   Correctly set version from Poetry in published builds by [@&#8203;mquinnfd](https://togithub.com/mquinnfd) in [https://github.com/locustio/locust/pull/2791](https://togithub.com/locustio/locust/pull/2791)
-   Fix Extend Webui Example by [@&#8203;andrewbaldwin44](https://togithub.com/andrewbaldwin44) in [https://github.com/locustio/locust/pull/2800](https://togithub.com/locustio/locust/pull/2800)
-   Provide warning for local installs where yarn is not present by [@&#8203;mquinnfd](https://togithub.com/mquinnfd) in [https://github.com/locustio/locust/pull/2801](https://togithub.com/locustio/locust/pull/2801)
-   Fix tests on windows by [@&#8203;mquinnfd](https://togithub.com/mquinnfd) in [https://github.com/locustio/locust/pull/2803](https://togithub.com/locustio/locust/pull/2803)
-   Add example of a bottlenecked server and use that test to make a new graph for the docs by [@&#8203;cyberw](https://togithub.com/cyberw) in [https://github.com/locustio/locust/pull/2805](https://togithub.com/locustio/locust/pull/2805)
-   Replace total avg response time with 50 percentile (avg was broken) by [@&#8203;andrewbaldwin44](https://togithub.com/andrewbaldwin44) in [https://github.com/locustio/locust/pull/2806](https://togithub.com/locustio/locust/pull/2806)
-   Avoid deadlock in gevent/urllib3 connection pool (fixes occasional worker heartbeat timeouts) by [@&#8203;tdadela](https://togithub.com/tdadela) in [https://github.com/locustio/locust/pull/2813](https://togithub.com/locustio/locust/pull/2813)
-   Fix Dockerfile style warning by [@&#8203;mehrdadbn9](https://togithub.com/mehrdadbn9) in [https://github.com/locustio/locust/pull/2814](https://togithub.com/locustio/locust/pull/2814)
-   Fix pypy gc.freeze() AttributeError by [@&#8203;jimoleary](https://togithub.com/jimoleary) in [https://github.com/locustio/locust/pull/2819](https://togithub.com/locustio/locust/pull/2819)
-   Update poetry windows tests by [@&#8203;mquinnfd](https://togithub.com/mquinnfd) in [https://github.com/locustio/locust/pull/2821](https://togithub.com/locustio/locust/pull/2821)

#### New Contributors

-   [@&#8203;bakhtos](https://togithub.com/bakhtos) made their first contribution in [https://github.com/locustio/locust/pull/2742](https://togithub.com/locustio/locust/pull/2742)
-   [@&#8203;mquinnfd](https://togithub.com/mquinnfd) made their first contribution in [https://github.com/locustio/locust/pull/2725](https://togithub.com/locustio/locust/pull/2725)
-   [@&#8203;mehrdadbn9](https://togithub.com/mehrdadbn9) made their first contribution in [https://github.com/locustio/locust/pull/2814](https://togithub.com/locustio/locust/pull/2814)
-   [@&#8203;jimoleary](https://togithub.com/jimoleary) made their first contribution in [https://github.com/locustio/locust/pull/2819](https://togithub.com/locustio/locust/pull/2819)

**Full Changelog**: locustio/locust@2.29.1...2.30.0

</details>

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