fix syntax

Signed-off-by: Nick Slowinski <nick@nick-slowinski.de>

renovate.json

@@ -1,6 +1,5 @@
 {
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json"
-  {
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "packageRules": [
     {
       "extends": "monorepo:docusaurus",
@@ -14,4 +13,3 @@
     }
   ]
 }
-}