ci: standardize dependabot updates

Author: afc163

.github/dependabot.yml

@@ -1,6 +1,19 @@
 version: 2
 updates:
-- package-ecosystem: npm
-  directory: "/"
-  schedule:
-    interval: daily
+  - package-ecosystem: npm
+    directory: '/'
+    schedule:
+      interval: weekly
+      day: monday
+      time: '21:00'
+      timezone: Asia/Shanghai
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: github-actions
+    directory: '/'
+    schedule:
+      interval: weekly
+      day: monday
+      time: '21:00'
+      timezone: Asia/Shanghai
+    open-pull-requests-limit: 10