Update dependabot.yml

Author: manuel-rw

.github/dependabot.yml

@@ -1,7 +1,7 @@
 version: 2
 updates:
-  - package-ecosystem: "dotnet-sdk" # See documentation for possible values
-    directory: "/GrocyScanner.sln" # Location of package manifests
+  - package-ecosystem: "nuget" # See documentation for possible values
+    directory: "/" # Location of package manifests
     schedule:
       interval: "daily"
     target-branch: "master"