chore: update changelog

Author: balsa-sarenac

CHANGELOG.md

@@ -12,8 +12,13 @@ and this project adheres to a _modified_ form of _[Semantic Versioning][semver]_
 
 ### Changed
 
+- Improve logging observability with dedicated regular and error logs, run start/end summaries, and package-update change counts. ([#28])
+
 ### Fixed
 
+- Fall back to stderr logging when file logging cannot be initialized, so runs still emit status output. ([#28])
+- Avoid clobbering importer logging setup by only removing upgrade-owned handlers and by leaving root level unchanged when foreign handlers are present. ([#28])
+
 ### Removed
 
 ## [0.9.1]
@@ -29,6 +34,7 @@ and this project adheres to a _modified_ form of _[Semantic Versioning][semver]_
 ### Removed
 
 [#26]: https://github.com/openlawlibrary/upgrade-python-package/pull/26
+[#28]: https://github.com/openlawlibrary/upgrade-python-package/pull/28
 
 ## [0.9.0]