Fix days key

Author: bjester

.github/dependabot.yml

@@ -10,7 +10,7 @@ updates:
       day: "friday"
       time: "00:00"
     cooldown:
-      days: 7
+      default-days: 7
   # Maintain dependencies for Github Actions
   - package-ecosystem: "github-actions"
     directory: "/"
@@ -23,4 +23,4 @@ updates:
         patterns:
           - "actions/*"
     cooldown:
-      days: 7
+      default-days: 7