chore(generated): add dependabot cooldown

Generated SDK source code using:
- Generator version 3.110.0
- Specification version 1.0.0-dev0.1.33
- Automation (cloudant-sdks) version 37521b4

Author: cloudant-sdks-automation

.github/dependabot.yml

@@ -4,20 +4,26 @@ updates:
     directory: "/"
     schedule:
       interval: "weekly"
+    cooldown:
+      default-days: 4
     pull-request-branch-name:
       separator: "-"
   - package-ecosystem: "pip"
     directory: "/"
     open-pull-requests-limit: 10
     schedule:
       interval: "daily"
+    cooldown:
+      default-days: 4
     pull-request-branch-name:
       separator: "-"
 # Custom settings
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
       interval: "weekly"
+    cooldown:
+      default-days: 4
     target-branch: "gh-pages"
     pull-request-branch-name:
       separator: "-"