chore(deps): update dependency vitest to v2

Author: renovate[bot]

package.json

@@ -69,7 +69,7 @@
     "size-limit": "^8.2.4",
     "typescript": "^5.0.4",
     "vite": "^6.0.1",
-    "vitest": "^0.31.1",
+    "vitest": "^2.1.8",
     "vue": "^3.3.4",
     "vue-prism-component": "^2.0.0",
     "yorkie": "^2.0.0"