Update changelog and contributing

Author: xrmx

CHANGELOG.md

@@ -16,6 +16,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - `opentelemetry-instrumentation`: botocore: Add support for AWS Secrets Manager semantic convention attribute
   ([#3765](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3765))
+- Add `rstcheck` to pre-commit to stop introducing invalid RST
+  ([#3777](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3777))
+
 
 ## Version 1.37.0/0.58b0 (2025-09-11)
 

CONTRIBUTING.md

@@ -85,7 +85,7 @@ You can run `tox` with the following arguments:
 * `tox -e generate-workflows` to run creation of new CI workflows if tox environments have been updated
 * `tox -e ruff` to run ruff linter and formatter checks against the entire codebase
 
-`ruff check` and `ruff format` are executed when `tox -e ruff` is run. We strongly recommend you to configure [pre-commit](https://pre-commit.com/) locally to run `ruff` automatically before each commit by installing it as git hooks. You just need to [install pre-commit](https://pre-commit.com/#install) in your environment:
+`ruff check` and `ruff format` are executed when `tox -e ruff` is run. We strongly recommend you to configure [pre-commit](https://pre-commit.com/) locally to run `ruff` and `rstcheck` automatically before each commit by installing it as git hooks. You just need to [install pre-commit](https://pre-commit.com/#install) in your environment:
 
 ```console
 pip install pre-commit -c dev-requirements.txt