chore(deps-dev): bump the dev-chai group

Bumps the dev-chai group in /packages/webhook with 2 updates: [@types/chai](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/chai) and [chai](https://github.com/chaijs/chai).


Updates `@types/chai` from 4.3.20 to 5.2.2
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/chai)

Updates `chai` from 4.5.0 to 5.2.1
- [Release notes](https://github.com/chaijs/chai/releases)
- [Changelog](https://github.com/chaijs/chai/blob/main/History.md)
- [Commits](chaijs/chai@v4.5.0...v5.2.1)

---
updated-dependencies:
- dependency-name: "@types/chai"
  dependency-version: 5.2.2
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: dev-chai
- dependency-name: chai
  dependency-version: 5.2.1
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: dev-chai
...

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

Author: dependabot[bot]

packages/webhook/package.json

@@ -47,10 +47,10 @@
   },
   "devDependencies": {
     "@biomejs/biome": "^2.0.5",
-    "@types/chai": "^4.3.5",
+    "@types/chai": "^5.2.2",
     "@types/mocha": "^10.0.1",
     "c8": "^10.1.3",
-    "chai": "^4.3.8",
+    "chai": "^6.0.1",
     "mocha": "^11.7.1",
     "mocha-junit-reporter": "^2.2.1",
     "mocha-multi-reporters": "^1.5.1",