chore: use renovatebot instead of dependabot

.github/dependabot.yml

@@ -1,30 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    assignees:
-      - "Boshen"
-
-  - package-ecosystem: "cargo"
-    directory: "/"
-    schedule:
-      interval: "weekly"
-    assignees:
-      - "Boshen"
-    groups:
-      dependencies:
-        update-types:
-          - "minor"
-          - "patch"
-    ignore:
-      - dependency-name: "textwrap"
-
-  # Enable when we have more resources
-  # - package-ecosystem: "gitsubmodule"
-  #   directory: "/"
-  #   schedule:
-  #     interval: "weekly"
-  #   assignees:
-  #     - "Boshen"

.github/renovate.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "packageRules": [
+    {
+      "matchManagers": ["github-actions"],
+      "schedule": ["on monday"],
+      "assignees": ["@Boshen"]
+    },
+    {
+      "matchManagers": ["cargo"],
+      "schedule": ["on monday"],
+      "assignees": ["@Boshen"]
+    }
+  ]
+}