fix: extract docker tag for updating release (again)

Signed-off-by: Todd Ekenstam <[email protected]>

Author: tekenstam

.github/workflows/image-push.yml

@@ -48,7 +48,7 @@ jobs:
         id: docker_tag
         run: |
           TAGS="${{ steps.meta.outputs.tags }}"
-          FIRST_IMAGE=$(echo "$TAGS" | cut -d',' -f1)
+          IFS=$'\n' read -r FIRST_IMAGE <<< "$TAGS"
           PRIMARY_TAG="${FIRST_IMAGE##*:}"
           echo "tag=$PRIMARY_TAG" >> $GITHUB_OUTPUT