fix(deps): align Dependabot with pnpm policy

Author: ericyangpan

.github/dependabot.yml

@@ -8,11 +8,11 @@ updates:
       day: "monday"
       time: "06:00"
       timezone: "UTC"
+    cooldown:
+      default-days: 3
     open-pull-requests-limit: 10
     reviewers:
       - "aicodingstack/maintainers"
-    assignees:
-      - "aicodingstack/maintainers"
     commit-message:
       prefix: "chore(deps)"
       include: "scope"
@@ -60,6 +60,10 @@ updates:
         update-types:
           - "minor"
           - "patch"
+    ignore:
+      - dependency-name: "@types/node"
+        versions:
+          - ">=23"
 
   # GitHub Actions
   - package-ecosystem: "github-actions"