Bump @mercuriusjs/federation from 3.0.0 to 4.0.0

Bumps [@mercuriusjs/federation](https://github.com/mercurius-js/mercurius-federation) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/mercurius-js/mercurius-federation/releases)
- [Commits](https://github.com/mercurius-js/mercurius-federation/commits)

---
updated-dependencies:
- dependency-name: "@mercuriusjs/federation"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -34,7 +34,7 @@
   },
   "homepage": "https://github.com/mercurius-js/validation",
   "devDependencies": {
-    "@mercuriusjs/federation": "^3.0.0",
+    "@mercuriusjs/federation": "^4.0.0",
     "@mercuriusjs/gateway": "^3.0.0",
     "@sinonjs/fake-timers": "^11.2.2",
     "@types/node": "^22.0.0",