Fix publish workflow: skip tag creation if already exists

Author: imperugo

.github/workflows/publish.yml

@@ -98,8 +98,13 @@ jobs:
         run: |
           git config user.name "github-actions"
           git config user.email "github-actions@github.com"
-          git tag -a "v$TAG_VERSION" -m "v$TAG_VERSION"
-          git push origin "v$TAG_VERSION"
+          git fetch --tags
+          if git rev-parse "v$TAG_VERSION" >/dev/null 2>&1; then
+            echo "Tag v$TAG_VERSION already exists, skipping"
+          else
+            git tag -a "v$TAG_VERSION" -m "v$TAG_VERSION"
+            git push origin "v$TAG_VERSION"
+          fi
         env:
           TAG_VERSION: ${{ steps.version.outputs.version }}