ci: support multiline tag messages in publish workflow

Use heredoc-style GITHUB_OUTPUT to avoid invalid format errors when the release changelog contains newlines.

.github/workflows/publish.yaml

@@ -45,7 +45,11 @@ jobs:
           VERSION="$VERSION.0"
           CHANGE_LOG=$(git tag -l '--format=%(contents)' ${{ github.ref_name }})
           echo "VERSION=${VERSION}" >> $GITHUB_OUTPUT
-          echo "CHANGE_LOG=${CHANGE_LOG}" >> $GITHUB_OUTPUT
+          {
+            echo "CHANGE_LOG<<CHANGELOG_EOF"
+            echo "${CHANGE_LOG}"
+            echo "CHANGELOG_EOF"
+          } >> $GITHUB_OUTPUT
           echo "APP_NAME=$(echo '${{ github.repository }}' | awk -F '/' '{print $2}')" >> $GITHUB_OUTPUT
       - name: Build
         run: |