Migrate config renovate.json (#48)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

renovate.json

@@ -1,22 +1,34 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": ["local>devfile-samples/.github:renovate-config"],
-  "enabledManagers": ["gomod", "dockerfile"],
+  "extends": [
+    "local>devfile-samples/.github:renovate-config"
+  ],
+  "enabledManagers": [
+    "gomod",
+    "dockerfile"
+  ],
   "gomod": {
-    "fileMatch": ["go\\.mod$", "go\\.sum$"]
+    "managerFilePatterns": [
+      "/go\\.mod$/",
+      "/go\\.sum$/"
+    ]
   },
   "packageRules": [
     {
-      "matchManagers": ["gomod"],
+      "matchManagers": [
+        "gomod"
+      ],
       "groupName": "go dependencies",
       "groupSlug": "go-deps",
       "commitMessageTopic": "Go {{depName}}"
     },
     {
-      "matchManagers": ["dockerfile"],
+      "matchManagers": [
+        "dockerfile"
+      ],
       "groupName": "dockerfile dependencies",
       "groupSlug": "dockerfile-deps",
       "commitMessageTopic": "Dockerfile {{depName}}"
     }
   ]
-}
+}