Adapted YML to latest GitHub actions security guidelines.

Author: ppanopticon

.github/workflows/release.yml

@@ -29,7 +29,7 @@ jobs:
         run: ./gradlew distTar
       - name: Get the version
         id: get_version
-        run: echo ::set-env name=VERSION::${GITHUB_REF/refs\/tags\//}
+        run: echo "VERSION=${GITHUB_REF/refs\/tags\/v/}" >> $GITHUB_ENV
       - name: Create Release
         id: create_release
         uses: actions/create-release@v1