Bump fetch-mock from 5.13.1 to 12.2.0

Bumps [fetch-mock](https://github.com/wheresrhys/fetch-mock/tree/HEAD/packages/fetch-mock) from 5.13.1 to 12.2.0.
- [Release notes](https://github.com/wheresrhys/fetch-mock/releases)
- [Changelog](https://github.com/wheresrhys/fetch-mock/blob/main/packages/fetch-mock/CHANGELOG.md)
- [Commits](https://github.com/wheresrhys/fetch-mock/commits/fetch-mock-v12.2.0/packages/fetch-mock)

---
updated-dependencies:
- dependency-name: fetch-mock
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -34,7 +34,7 @@
     "@types/node": "22.10.1",
     "chai": "^4.5.0",
     "dotcom-tool-kit": "^4.0.6",
-    "fetch-mock": "^5.1.2",
+    "fetch-mock": "^12.2.0",
     "sinon": "^19.0.2",
     "sinon-chai": "^3.0.0",
     "supertest": "^7.0.0",