chore(deps): update dependency chai to v6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

zkp/js/package.json

@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "@iden3/js-merkletree": "1.5.1",
-    "chai": "5.3.3",
+    "chai": "6.2.1",
     "circom_tester": "0.0.24",
     "circomlibjs": "0.1.7",
     "mocha": "11.7.5",