Fix GitHub Actions output redirection syntax

Co-authored-by: elasticdotventures <[email protected]>

Author: Copilot

.github/workflows/release-and-publish.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Determine tag name
         id: tag
         run: |
-          echo "ref_name=${GITHUB_REF##*/}" &> $GITHUB_OUTPUT
+          echo "ref_name=${GITHUB_REF##*/}" >> $GITHUB_OUTPUT
 
       - name: Build and push multi-arch Docker image
         uses: docker/build-push-action@v4