Update stylelint-config-standard-scss to v15

| datasource | package                        | from   | to     |
| ---------- | ------------------------------ | ------ | ------ |
| npm        | stylelint-config-standard-scss | 10.0.0 | 15.0.1 |

Author: renovate[bot]

package.json

@@ -34,7 +34,7 @@
     "stylelint-find-new-rules": "4.1.2"
   },
   "dependencies": {
-    "stylelint-config-standard-scss": "^10.0.0",
+    "stylelint-config-standard-scss": "^15.0.0",
     "stylelint-declaration-strict-value": "^1.9.2",
     "stylelint-order": "^6.0.3"
   },