Update stylelint-find-new-rules to v5

| datasource | package                  | from  | to    |
| ---------- | ------------------------ | ----- | ----- |
| npm        | stylelint-find-new-rules | 4.1.2 | 5.0.0 |

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "prettier": "3.5.3",
     "prettier-2": "npm:[email protected]",
     "stylelint": "15.10.2",
-    "stylelint-find-new-rules": "4.1.2"
+    "stylelint-find-new-rules": "5.0.0"
   },
   "dependencies": {
     "stylelint-config-standard-scss": "^10.0.0",