ci: Upgrade Renovate config.

Author: octo

.renovate.json

@@ -1,14 +1,15 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:base"
-  ],
+  "extends": ["config:recommended"],
   "schedule": ["before 5am on monday"],
-  "golang": {
-    "enabled": true
-  },
   "postUpdateOptions": ["gomodTidy"],
   "automerge": false,
   "prHourlyLimit": 0,
-  "prConcurrentLimit": 0
+  "prConcurrentLimit": 0,
+  "packageRules": [
+    {
+      "matchCategories": ["golang"],
+      "enabled": true
+    }
+  ]
 }