Description

I just copied the one from flutter/plugins and changed the content key to point at README.md*

Related Issues

N/A

Checklist

Before you create this PR confirm that it meets all requirements listed below by checking the relevant checkboxes ([x]). This will ensure a smooth and quick review process.

• [x ] I read the Contributor Guide and followed the process outlined there for submitting PRs.
• [ x] If the pull request affects only one plugin, the PR title starts with the name of the plugin in brackets (e.g. [cloud_firestore])
• [ x] My PR includes unit or integration tests for all changed/updated/fixed behaviors (See Contributor Guide).
• [x ] All existing and new tests are passing.
• [x ] I updated/added relevant documentation (doc comments with ///).
• [ x] The analyzer (flutter analyze) does not report any problems on my PR.
• [ x] I read and followed the Flutter Style Guide.
• [ x] The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• [ x] I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy.
• [ x] I updated CHANGELOG.md to add a description of the change.
• [ x] I signed the CLA.
• [ x] I am willing to follow-up on review comments in a timely manner.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate a breaking change in CHANGELOG.md and increment major revision).
• [ x] No, this is not a breaking change.