Use directories property in dependabot.yml (#1160)

As per
https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#directories

.github/dependabot.yml

@@ -1,21 +1,13 @@
-# Please see the documentation for all configuration options:
-# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+# Configuration options at https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml
 
 version: 2
 updates:
 - package-ecosystem: github-actions
-  directory: ".github/workflows/"
-  schedule:
-    interval: weekly
-- package-ecosystem: github-actions
-  directory: "/Templates/Per Tenant Extension/.github/workflows/"
-  schedule:
-    interval: weekly
+  directories:
+    - ".github/workflows/"
+    - "/Templates/Per Tenant Extension/.github/workflows/"
+    - "/Templates/AppSource App/.github/workflows/"
   ignore:
     - dependency-name: "microsoft/AL-Go-Actions/*"
-- package-ecosystem: github-actions
-  directory: "/Templates/AppSource App/.github/workflows/"
   schedule:
     interval: weekly
-  ignore:
-    - dependency-name: "microsoft/AL-Go-Actions/*"