Delay dependabot updates by 5 days (#41)

Wait 5 days to get updates. We hope supply chain attacks are detected
before these 5 days.

Author: erikdubbelboer

.github/dependabot.yml

@@ -8,6 +8,8 @@ updates:
       github-actions:
         patterns:
           - "*"
+    cooldown:
+      default-days: 5
   - package-ecosystem: "gomod"
     directory: "/"
     schedule:
@@ -16,3 +18,5 @@ updates:
       gomod:
         patterns:
           - "*"
+    cooldown:
+      default-days: 5