build(deps-dev): update dependency chai to v6

Author: renovate[bot]

package.json

@@ -14,7 +14,7 @@
     "marked-gfm-heading-id": "4.1.2"
   },
   "devDependencies": {
-    "chai": "4.5.0",
+    "chai": "6.2.0",
     "codecov": "3.8.3",
     "conventional-changelog-conventionalcommits": "9.1.0",
     "cz-conventional-changelog": "3.3.0",