release_notes: update RELEASE_NOTES.md

Align list item punctuation with style guide by removing trailing period.

Author: sg-doc-holiday[bot]

RELEASE_NOTES.md

@@ -8,7 +8,7 @@ Release notes for event time 2025-12-10T13:44:52Z are listed below.
 ## 🚀
 
 - Updated the app connection and AI settings pages for a clearer configuration experience
-- Added a clear button to the connections dropdown to quickly reset the selected connection.
+- Added a clear button to the connections dropdown to quickly reset the selected connection
 - Improved the workflow builder connection selector with clearer typography.
 - Introduced a visual indicator for sensitive actions in the workflow builder.