Update dependency chai to v6.2.1

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
     "@mathjax/src": "4.0.0"
   },
   "devDependencies": {
-    "chai": "6.2.0",
+    "chai": "6.2.1",
     "mocha": "11.7.4"
   }
 }