Bump vitest from 3.2.4 to 4.0.8

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 3.2.4 to 4.0.8.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.8/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 4.0.8
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -19,7 +19,7 @@
     "devDependencies": {
         "prettier": "3.6.2",
         "sharp": "^0.34.4",
-        "vitest": "^3.2.4",
+        "vitest": "^4.0.8",
         "wrangler": "^4.45.0"
     }
 }