Bump vite from 5.4.10 to 5.4.21 in /playground

Bumps [vite](https://github.com/vitejs/vite/tree/HEAD/packages/vite) from 5.4.10 to 5.4.21.
- [Release notes](https://github.com/vitejs/vite/releases)
- [Changelog](https://github.com/vitejs/vite/blob/v5.4.21/packages/vite/CHANGELOG.md)
- [Commits](https://github.com/vitejs/vite/commits/v5.4.21/packages/vite)

---
updated-dependencies:
- dependency-name: vite
  dependency-version: 5.4.21
  dependency-type: direct:production
...

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

Author: dependabot[bot]

playground/package-lock.json

@@ -10,7 +10,7 @@
   "dependencies": {
     "@syuilo/aiscript": "file:..",
     "prismjs": "^1.29.0",
-    "vite": "^5.4.8",
+    "vite": "^5.4.21",
     "vue": "^3.5.11",
     "vue-prism-editor": "^2.0.0-alpha.2"
   },