fixing typo

Author: goergisn

.github/workflows/detect-api.changes.yml

@@ -65,7 +65,7 @@ jobs:
 
     - name: 🚦 Test Output
       run: |
-        FILE_PATH="${{ steps.public_api_diff.outputs.filepath }}
+        FILE_PATH="${{ steps.public_api_diff.outputs.filepath }}"
         echo "Filepath: $FILE_PATH"
 
     - if: ${{ github.event.pull_request.base.ref != '' }}