chore: add cooldown to npm updates (#125)

Author: LesnyRumcajs

.github/dependabot.yml

@@ -11,6 +11,8 @@ updates:
   - package-ecosystem: "npm"
     directory: "/"
     open-pull-requests-limit: 1
+    cooldown:
+      default-days: 5
     schedule:
       interval: "weekly"
     # https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#groups