Improve CHANGELOG

Author: bouwew

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## v1.11.3
 
-- Better handle missing thermostat data via PR [#860](https://github.com/plugwise/python-plugwise/pull/860)
+- Improve handling of missing thermostat data via PR [#860](https://github.com/plugwise/python-plugwise/pull/860)
 - More code optimizations via PR [#843](https://github.com/plugwise/python-plugwise/pull/843)
 - Chores:
   - Introduce prek (for pre-commit) & align with v2 gh-actions