Update dependency Microsoft.AspNetCore.Mvc.Testing to v9

Author: renovate[bot]

Basic.Template.API/content/API.Tests/API.Tests.csproj

@@ -6,7 +6,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="3.1.8"/>
+        <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.9"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1"/>
         <PackageReference Include="xunit" Version="2.4.1"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3"/>