Update tj-actions/verify-changed-files action to v20

Author: renovate[bot]

.github/workflows/upgrade-tree-sitter.yml

@@ -26,7 +26,7 @@ jobs:
         run: bash scripts/upgrade-tree-sitter.sh
 
       - name: Verify file changes
-        uses: tj-actions/verify-changed-files@v17
+        uses: tj-actions/verify-changed-files@v20
         id: verify-changed-files
         with:
           files: |