chore: change issue number

Author: Rodrigo-Novas

Diff for: CHANGELOG.md

@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Breaking changes
 
 - Deprecation of pkg_resource in favor of importlib.metadata
-  ([#2180](https://github.com/open-telemetry/opentelemetry-python-contrib/issues/2180))
+  ([#2181](https://github.com/open-telemetry/opentelemetry-python-contrib/issues/2181))
 
 ## Version 1.27.0/0.48b0 ()