final removal of set-output

.github/workflows/workflow-docker-release.yml

@@ -44,17 +44,17 @@ jobs:
           command: |
             export
       - name: Identify GitHub Release tag name
-        # get tag name from runners environment 'GITHUB_REF' and then use bash substring
+        # get tag name from runners environment 'GITHUB_REF_NAME' and then use bash substring
         # to strip out '+' symbol - required due to gcr not supporting this as a tag
         # name (docker hub does support it).
-        # note if push is NOT triggered by tag then 'GITHUB_REF' will be the branch name.
+        # note if push is NOT triggered by tag then 'GITHUB_REF_NAME' will be the branch name.
         uses: nick-fields/retry@v2
         with:
           timeout_minutes: 5
           max_attempts: 3
           retry_wait_seconds: 120
           command: |
-            echo "##[set-output name=tag;]$(tag_name=${GITHUB_REF#refs/tags/} && echo "${tag_name//+/-}")"
+            tag="${GITHUB_REF_NAME}" && echo "tag=${tag//+/-}" >> $GITHUB_OUTPUT
         id: identify_github_release_tag_name
       - name: Generate temporary tag name
         shell: bash