Update release.yml

Author: niik

.github/workflows/release.yml

@@ -9,7 +9,7 @@ on:
       dry-run:
         description: Perform a dry run without creating a release
         required: false
-        default: false
+        default: true
         type: boolean
 
 jobs:
@@ -33,6 +33,13 @@ jobs:
             exit 1
           fi
 
+      - name: Verify tag does not already exist
+        run: |
+          if git rev-parse "${{ github.event.inputs.version }}" >/dev/null 2>&1; then
+            echo "Error: Tag '${{ github.event.inputs.version }}' already exists."
+            exit 1
+          fi
+
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with: