Dependabot config tweak

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

.github/dependabot.yml

@@ -1,17 +1,10 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
 version: 2
 updates:
-  # Maintain dependencies for GitHub Actions
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: weekly
     day: saturday
     time: "10:00"
   open-pull-requests-limit: 10
-  target-branch: development
-  versioning-strategy: increase
+  target-branch: developement