Replace deprecated set-output command with environment files approach

Co-Authored-By: Toshihiro Nakamura <[email protected]>

Author: devin-ai-integration[bot]

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
 
       - name: Set version
         id: set-version
-        run: ./gradlew properties | grep "^version:" | awk '{print $2}' | { read v; echo "::set-output name=version::$v"; }
+        run: ./gradlew properties | grep "^version:" | awk '{print $2}' | { read v; echo "version=$v" >> $GITHUB_OUTPUT; }
 
       - name: Print version
         run: echo ${{ steps.set-version.outputs.version }}