Tweak dependabot (#197)

Author: GeirMG

.github/dependabot.yml

@@ -8,4 +8,5 @@ updates:
   - package-ecosystem: "nuget" # See documentation for possible values
     directory: "/" # Location of package manifests
     schedule:
-      interval: "daily"
+      interval: "weekly"
+    open-pull-requests-limit: 100

Fhi.ClientCredentials.sln

@@ -35,6 +35,7 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Fhi.ClientCredentialsKeypai
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "github", "github", "{12494565-61F9-4B87-9B89-FB4F11720EE2}"
 	ProjectSection(SolutionItems) = preProject
+		.github\dependabot.yml = .github\dependabot.yml
 		.github\release.yml = .github\release.yml
 	EndProjectSection
 EndProject