Add Dependabot cooldown period

Author: legoscia

.github/dependabot.yml

@@ -13,11 +13,15 @@ updates:
       update-types:
       - "minor"
       - "patch"
+  cooldown:
+    default-days: 7
 - package-ecosystem: "github-actions"
   directory: "/"
   schedule:
     interval: monthly
   groups:
     gh-actions:
       patterns:
-      - "*"
+      - "*"
+  cooldown:
+    default-days: 7