fix(deps): update dependency @netlify/config to ^5.1.1

Author: renovate-bot

package-lock.json

@@ -29,7 +29,7 @@
   "author": "Netlify",
   "license": "MIT",
   "dependencies": {
-    "@netlify/config": "^5.1.0",
+    "@netlify/config": "^5.1.1",
     "lodash.isplainobject": "^4.0.6"
   },
   "devDependencies": {