Update release.yml

Author: rijesha

.github/workflows/release.yml

@@ -38,6 +38,10 @@ jobs:
       - name: Install Dependencies
         run: npm ci
 
+      # Build the bundled extension (produces dist/extension.js for main entrypoint)
+      - name: Build Extension
+        run: npm run esbuild
+
       # Step 4: Handle prerelease logic for pushes to 'develop'.
       - name: Publish Prerelease to Open VSX
         if: github.ref == 'refs/heads/develop'