chore(deps): update dependency vitest to v4 (#245)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -84,7 +84,7 @@
     "styled-components": "npm:@sanity/css-in-js@6.1.25",
     "typescript": "5.9.3",
     "vite": "^7.1.12",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.6"
   },
   "peerDependencies": {
     "react": "^18.2 || ^19"