fix: add discussions toolset to siderepo-add-discussion-comment workflow

Co-authored-by: dsyme <7204669+dsyme@users.noreply.github.com>

Author: Copilot

.github/workflows/test-copilot-siderepo-add-discussion-comment.lock.yml

@@ -16,6 +16,7 @@ tools:
   github:
     # The GitHub tools must be authorized to read across-repo 
     github-token: ${{ secrets.TEMP_USER_PAT }}
+    toolsets: [all]
 
 safe-outputs:
   github-token: ${{ secrets.TEMP_USER_PAT }}