Update dependency chai to v6

Author: renovate[bot]

package.json

@@ -40,7 +40,7 @@
     "@rollup/plugin-node-resolve": "16.0.3",
     "@rollup/plugin-replace": "6.0.3",
     "axios": "1.13.4",
-    "chai": "4.3.4",
+    "chai": "6.2.2",
     "concurrently": "9.2.1",
     "husky": "9.1.7",
     "karma": "6.4.4",