fix: Improve tag existence check in release workflow

.github/workflows/release.yml

@@ -28,6 +28,9 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Fetch tags
+        run: git fetch --tags origin
+
       - name: Determine plugin version
         id: meta
         run: |
@@ -43,7 +46,7 @@ jobs:
         id: tagcheck
         run: |
           TAG="v${{ steps.meta.outputs.version }}"
-          if git rev-parse "$TAG" >/dev/null 2>&1; then
+          if git show-ref --tags --verify --quiet "refs/tags/$TAG"; then
             echo "exists=true" >> "$GITHUB_OUTPUT"
           else
             echo "exists=false" >> "$GITHUB_OUTPUT"