Use grouped dependabot updates

Author: hhvrc

.github/dependabot.yml

@@ -1,27 +1,21 @@
-# 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://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
 version: 2
-updates:
 
-  # Check for Github Actions version updates (for CI/CD)
-  - package-ecosystem: "github-actions"
-    directory: "/"
+multi-ecosystem-groups:
+  maintenance:
     schedule:
-      interval: 'weekly'
-      day: 'monday'
+      interval: weekly
+      day: monday
       time: '06:00'
 
-  # Check for Nuget package updates
-  - package-ecosystem: "nuget"
-    directory: "/"
-    schedule:
-      interval: 'weekly'
-      day: 'monday'
-      time: '06:00'
-    groups:
-      nuget-dependencies:
-        patterns:
-          - '*' # Group all updates together
+updates:
+  - package-ecosystem: nuget
+    directory: /
+    patterns:
+      - '*'
+    multi-ecosystem-group: maintenance
+
+  - package-ecosystem: github-actions
+    directory: /
+    patterns:
+      - '*'
+    multi-ecosystem-group: maintenance