shorten line to fix yaml issue

Author: Cube707

.github/workflows/publish.yaml

@@ -23,7 +23,11 @@ jobs:
       - name: Set env
         run: |
           echo "RELEASE_TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
-          echo "BRANCH=$(git branch -r --contains ${GITHUB_REF} | grep -v HEAD | sed -n 's/ *origin\/\(.*\)/\1/p')" >> $GITHUB_ENV
+          echo "BRANCH=$( \
+              git branch -r --contains ${GITHUB_REF} \
+              | grep -v HEAD \
+              | sed -n 's/ *origin\/\(.*\)/\1/p' \
+            )" >> $GITHUB_ENV
       - name: Set up Python
         uses: actions/setup-python@v4
         with: