chore: cooldown dependabot (#414)

Author: LesnyRumcajs

.github/dependabot.yml

@@ -6,6 +6,8 @@ updates:
   - package-ecosystem: "cargo"
     directory: "/" # Location of package manifests
     open-pull-requests-limit: 1
+    cooldown:
+      default-days: 5
     schedule:
       interval: "weekly"
     # https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuring-dependabot-version-updates#example-disabling-version-updates-for-some-dependencies