chore(deps): pin chai as v5+ is ESM only

Author: MIchaelMainer

package.json

@@ -103,7 +103,7 @@
         "@types/sinon": "^10.0.8",
         "@typescript-eslint/eslint-plugin": "^8.2.0",
         "@typescript-eslint/parser": "^8.2.0",
-        "chai": "^6.0.1",
+        "chai": "^4.5.0",
         "eslint": "^9.9.1",
         "eslint-config-prettier": "^10.0.1",
         "eslint-plugin-prettier": "^5.0.0",