Use the non-deprecated syntax to set actions output

Author: sjoubert

.github/workflows/build_test_package.yml

@@ -210,7 +210,7 @@ jobs:
 
       - name: Retrieve branch or tag name
         id: refvar
-        run: echo "::set-output name=gitRefName::${GITHUB_REF#refs/*/}"
+        run: echo "gitRefName=${GITHUB_REF#refs/*/}" >> "${GITHUB_OUTPUT}"
 
       - name: Setup Gradle
         uses: gradle/actions/setup-gradle@v4

.github/workflows/openapi_clients.yml

@@ -65,7 +65,7 @@ jobs:
         run: |
           echo -e "Automatically update ${{ matrix.language }} client (ref: ${{ github.repository }}@${{ github.sha }})\n" > /tmp/commit-file.txt
           echo "Co-authored-by: $GITHUB_ACTOR <[email protected]>" >> /tmp/commit-file.txt
-          echo "::set-output name=filePath::/tmp/commit-file.txt"
+          echo "filePath=/tmp/commit-file.txt" >> "${GITHUB_OUTPUT}"
 
       - name: Push ${{ matrix.language }} Client to ${{ matrix.repo }}
         if: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/') }}