Fix link to PR

Author: xrmx

CHANGELOG.md

@@ -13,7 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 - Add `rstcheck` to pre-commit to stop introducing invalid RST
-  ([#4755](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4755))
+  ([#4755](https://github.com/open-telemetry/opentelemetry-python/pull/4755))
 
 ## Version 1.37.0/0.58b0 (2025-09-11)