release_notes: update RELEASE_NOTES.md

Update bullet formatting to remove trailing period and conform to style guide lists rules.

Author: sg-doc-holiday[bot]

RELEASE_NOTES.md

@@ -10,7 +10,7 @@ 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
-- Introduced a visual indicator for sensitive actions in the workflow builder.
+- Introduced a visual indicator for sensitive actions in the workflow builder
 
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