fetch tags

Author: kuboon

.github/workflows/gem-push.yml

@@ -17,6 +17,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        fetch-tags: 'true'
     - name: Set up Ruby 3.3
       uses: ruby/setup-ruby@v1
       with:
@@ -29,6 +31,7 @@ jobs:
 
     - name: Check already released
       run: |
+        git tag
         if git tag | grep -q $TAG_NAME; then
           echo "$TAG_NAME already released. skip."
           exit 0