release_notes: update RELEASE_NOTES.md

Ensure unordered list items do not end with periods per formatting requirements.

Author: sg-doc-holiday[bot]

RELEASE_NOTES.md

@@ -9,7 +9,7 @@ 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
-- Improved the workflow builder connection selector with clearer typography.
+- Improved the workflow builder connection selector with clearer typography
 - Introduced a visual indicator for sensitive actions in the workflow builder.
 
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