docs(changelog): add changelog entry for logging observability

Author: balsa-sarenac

CHANGELOG.md

@@ -12,10 +12,17 @@ and this project adheres to a _modified_ form of _[Semantic Versioning][semver]_
 
 ### Changed
 
+- Improve logging observability with dedicated regular and error logs. ([#28])
+
 ### Fixed
 
+- Fall back to stderr logging when file logging cannot be initialized. ([#28])
+- Removing upgrade-owned handlers and leave root level unchanged when foreign handlers are present. ([#28])
+
 ### Removed
 
+[#28]: https://github.com/openlawlibrary/upgrade-python-package/pull/28
+
 ## [0.9.1]
 
 ### Added