fix(eslint-config-fuf): update dependency @vitest/eslint-plugin to v1.6.20

Author: renovate[bot]

packages/eslint-config-fuf/package.json

@@ -44,7 +44,7 @@
     "@eslint/js": "10.0.1",
     "@ianvs/prettier-plugin-sort-imports": "4.7.1",
     "@prettier/plugin-php": "0.25.0",
-    "@vitest/eslint-plugin": "1.6.19",
+    "@vitest/eslint-plugin": "1.6.20",
     "eslint": "10.4.1",
     "eslint-config-airbnb-extended": "3.1.0",
     "eslint-config-prettier": "10.1.8",