Fix formatting of directories in dependabot.yml

Author: mcm1957

.github/dependabot.yml

@@ -10,7 +10,8 @@ updates:
     open-pull-requests-limit: 15
     versioning-strategy: "increase"
   - package-ecosystem: "github-actions"
-    directories: "**/*"
+    directories: 
+      - "**/*"
     schedule:
       interval: "cron"
       timezone: "Europe/Berlin"