Update CHANGELOG

Author: bouwew

CHANGELOG.md

@@ -1,8 +1,9 @@
 # Changelog
 
-## Ongoing
+## v1.7.6
 
 - Maintenance chores (mostly reworking Github CI Actions) backporting from efforts on Python Plugwise [USB: 264](https://github.com/plugwise/python-plugwise-usb/pull/264) after porting our progress using [USB: 263](https://github.com/plugwise/python-plugwise-usb/pull/263)
+- Don't raise an error when a locked switch is being toggled, and other switch-related improvements via [755](https://github.com/plugwise/python-plugwise/pull/755)
 
 ## v1.7.5