Use set-output to propagate release tag.

Author: marc0der

.github/workflows/release.yml

@@ -19,9 +19,10 @@ jobs:
       with:
         token: ${{secrets.GITHUB_TOKEN}}
     - name: Set github tag
-      run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      id: vars
+      run: echo ::set-output name=tag::${GITHUB_REF#refs/*/}
     - name: Build artifacts
-      run: ./gradlew -Penv=production -Prelease= ${{ env.RELEASE_VERSION }} -PbuildNumber=${{ steps.buildnumber.outputs.build_number }} clean assemble
+      run: ./gradlew -Penv=production -Prelease= ${{ steps.vars.outputs.tag }} -PbuildNumber=${{ steps.buildnumber.outputs.build_number }} clean assemble
     - uses: ncipollo/release-action@v1
       with:
         artifacts: "build/distributions/sdkman-cli-*.zip"