chore(deps): update dependency solhint to v6

Author: renovate[bot]

package.json

@@ -84,7 +84,7 @@
     "karma-safari-launcher": "1.0.0",
     "mocha": "11.7.5",
     "rimraf": "4.4.1",
-    "solhint": "5.0.5",
+    "solhint": "6.0.3",
     "solidity-cli": "1.0.3",
     "stream-browserify": "3.0.0",
     "terser-webpack-plugin": "5.3.16",