Remove extra whitespace in the Changelog

Author: OlegZv

CHANGELOG.md

@@ -28,7 +28,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3100](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3100))
 - Add support to database stability opt-in in `_semconv` utilities and add tests
   ([#3111](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3111))
-
 - `opentelemetry-instrumentation-urllib` Add `py.typed` file to enable PEP 561
   ([#3131](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3131))
 - `opentelemetry-opentelemetry-pymongo` Add `py.typed` file to enable PEP 561