chore(deps): bump @vitest/coverage-v8 in /packages/express-adapter

Bumps [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8) from 3.2.4 to 4.0.4.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.0.4/packages/coverage-v8)

---
updated-dependencies:
- dependency-name: "@vitest/coverage-v8"
  dependency-version: 4.0.4
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/express-adapter/package.json

@@ -27,7 +27,7 @@
 	},
 	"devDependencies": {
 		"@types/express": "5.0.3",
-		"@vitest/coverage-v8": "3.2.4",
+		"@vitest/coverage-v8": "4.0.4",
 		"node-mocks-http": "1.17.2",
 		"tsup": "8.5.0",
 		"typescript": "5.9.2",