Bump Microsoft.NET.Test.Sdk from 18.3.0 to 18.4.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -32,7 +32,7 @@
     <PackageVersion Include="Microsoft.Extensions.Options" Version="10.0.1" />
     <PackageVersion Include="Microsoft.Extensions.ServiceDiscovery" Version="10.4.0" />
     <PackageVersion Include="Microsoft.Identity.Web" Version="4.7.0" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
     <PackageVersion Include="MinVer" Version="7.0.0" />
     <PackageVersion Include="MongoDB.Abstracts" Version="7.1.1" />
     <PackageVersion Include="MongoDB.Driver" Version="3.7.1" />