Bump sinon-chai from 3.7.0 to 4.0.0

Bumps [sinon-chai](https://github.com/chaijs/sinon-chai) from 3.7.0 to 4.0.0.
- [Release notes](https://github.com/chaijs/sinon-chai/releases)
- [Changelog](https://github.com/chaijs/sinon-chai/blob/master/CHANGELOG.md)
- [Commits](chaijs/sinon-chai@3.7.0...4.0.0)

---
updated-dependencies:
- dependency-name: sinon-chai
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -36,7 +36,7 @@
     "dotcom-tool-kit": "^4.3.7",
     "fetch-mock": "^5.1.2",
     "sinon": "^19.0.2",
-    "sinon-chai": "^3.0.0",
+    "sinon-chai": "^4.0.0",
     "supertest": "^7.0.0",
     "typescript": "^5.7.3"
   },