chore: use deterministic changeset filename for debugger assets (#313)

Change the debugger asset update workflow to use a fixed filename
(.changeset/update-debugger-assets.md) instead of a timestamp-based
one. This ensures multiple updates accumulate into a single changelog
entry with the latest contents, rather than creating separate entries
for each update.

https://claude.ai/code/session_018SR5swLkGS4mVgY8RUR9iP

Co-authored-by: Claude <noreply@anthropic.com>

.github/workflows/update_debugger_assets.yml

@@ -48,8 +48,8 @@ jobs:
 
       - name: Create changeset for patch version
         run: |
-          # Create a changeset file with a unique name
-          CHANGESET_FILE=".changeset/update-debugger-assets-$(date +%s).md"
+          # Use a deterministic filename so multiple updates accumulate into one changelog entry
+          CHANGESET_FILE=".changeset/update-debugger-assets.md"
           cat > "$CHANGESET_FILE" << 'EOF'
           ---
           "llama-index-workflows": patch