chore(deps): update Dependabot config to limit open pull requests and change schedule to weekly (#400)

Author: shenxianpeng

.github/dependabot.yml

@@ -9,14 +9,16 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    open-pull-requests-limit: 10
     groups:
       actions:
         patterns:
           - "*"
   - package-ecosystem: uv
     directory: /
     schedule:
-      interval: "daily"
+      interval: "weekly"
+    open-pull-requests-limit: 10
     groups:
       org:
         # updates about org-maintained packages