Create dependabot.yml

.github/dependabot.yml

@@ -0,0 +1,23 @@
+# 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/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # Core GitHub Actions
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "wednesday"
+  - package-ecosystem: "nuget"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+      day: "wednesday"
+    open-pull-requests-limit: 5
+    groups:
+      # Group .NET updates together for solutions.
+      dotnet:
+        patterns:
+          - "*" # Prefer a single PR per solution update.