Create dependabot.yml (#20)

# Pull Request

Enable Dependabot for the ALZ Powershell module.

## Issue

#19 

## Description

I can't test this until this is committed to main - I hope I've got this
right...

## License

By submitting this pull request, I confirm that my contribution is made
under the terms of the projects associated license.

Author: lovelysandwich

.github/dependabot.yml

@@ -0,0 +1,11 @@
+# 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:
+  - package-ecosystem: "nuget" # See documentation for possible values
+    directory: "/src/ALZ" # Location of package manifests
+    schedule:
+      interval: "daily"