chore: update dependabot cooldown default-days from 5 to 7

Author: harehare

.github/dependabot.yml

@@ -6,7 +6,6 @@ updates:
       interval: "daily"
       time: "20:00"
     cooldown:
-      default-days: 5
+      default-days: 7
       semver-major-days: 7
     open-pull-requests-limit: 10
-