Quote occurrence of GITHUB_OUTPUT environment variable

Co-authored-by: Stan Ulbrych <[email protected]>

Author: rffontenelle

.github/workflows/ci.yml

@@ -80,8 +80,7 @@ jobs:
       id: languages
       working-directory: ${{ steps.version.outputs.current }}
       run: |
-        # shellcheck disable=SC2086
-        echo "languages=$(../scripts/list-langs.py)" >> $GITHUB_OUTPUT
+        echo "languages=$(../scripts/list-langs.py)" >> "$GITHUB_OUTPUT"
 
     - name: Print variables values
       run: |