chore(deps): update dependency chai to v6

Author: renovate[bot]

package.json

@@ -341,7 +341,7 @@
         "@vscode/test-electron": "^2.5.2",
         "bluebird": "3.7.2",
         "bluebird-retry": "0.11.0",
-        "chai": "^4.5.0",
+        "chai": "^6.0.0",
         "esbuild": "^0.25.8",
         "husky": "^9.1.7",
         "mocha": "^11.7.1",