chore: add 7-day dependabot cooldown

Author: OpenClaw

.github/dependabot.yml

@@ -4,6 +4,8 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
+    cooldown:
+      default-days: 7
     ignore:
       - dependency-name: "@types/node"
         versions:
@@ -12,3 +14,5 @@ updates:
     directory: "/"
     schedule:
       interval: "monthly"
+    cooldown:
+      default-days: 7