Bump @vitejs/plugin-react from 5.1.3 to 6.0.1 in /webview-ui

Bumps [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/tree/HEAD/packages/plugin-react) from 5.1.3 to 6.0.1.
- [Release notes](https://github.com/vitejs/vite-plugin-react/releases)
- [Changelog](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite-plugin-react/commits/plugin-react@6.0.1/packages/plugin-react)

---
updated-dependencies:
- dependency-name: "@vitejs/plugin-react"
  dependency-version: 6.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

webview-ui/package-lock.json

@@ -18,7 +18,7 @@
     "@types/node": "^24.10.1",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
-    "@vitejs/plugin-react": "^5.1.1",
+    "@vitejs/plugin-react": "^6.0.1",
     "eslint": "^9.39.1",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-react-hooks": "^7.0.1",