[docs] Post release instructions - broken link #1445
Description
In RELEASING.md, the following section has a broken link:
## Post Release
Update the OpenTelemetry.io document
[here](https://github.com/open-telemetry/opentelemetry.io/tree/main/content/en/docs/cpp)
by sending a Pull Request.
This was caused by
Move languages under /docs/instrumentation #963
Fix: docs/cpp -> docs/instrumentation/cpp