Try to fix GitHUb ref env. variable

.github/workflows/release.yml

@@ -37,7 +37,7 @@ jobs:
         id: release_name
         uses: web3j/[email protected]
         with:
-          value: ${GITHUB_REF}
+          value: ${{ GITHUB_REF }}
           start: 8 # Remove 'release/' prefix 
       - name: Build and stage release
         run: ./gradlew publish bintrayUpload -Pversion=${{ steps.release_name.outputs.result }}