update renovate config and remove dependabot (#1994)

.github/dependabot.yml

@@ -1,15 +0,0 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
-version: 2
-updates:
-  - package-ecosystem: "gomod" # See documentation for possible values
-    directory: "/" # Location of package manifests
-    schedule:
-      interval: "monthly"
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "monthly"

.github/renovate.json

@@ -2,5 +2,7 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:base"
-  ]
+  ],
+  "prConcurrentLimit": 3,
+  "prHourlyLimit": 2
 }