chore(deps): update nuget microsoft.net.test.sdk to v18

Author: renovate[bot]

tests/MongoFramework.AspNetCore.Identity.Tests/MongoFramework.AspNetCore.Identity.Tests.csproj

@@ -10,7 +10,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
     <PackageReference Include="MongoFramework" Version="0.29.0" />
     <PackageReference Include="Shouldly" Version="4.2.1" />
     <PackageReference Include="xunit" Version="2.5.0" />