Bump Akka.Hosting.TestKit and Akka.TestKit.Xunit2 in /unit-1/completed (#349)

Bumps [Akka.Hosting.TestKit](https://github.com/akkadotnet/Akka.Hosting) and [Akka.TestKit.Xunit2](https://github.com/akkadotnet/akka.net). These dependencies needed to be updated together.

Updates `Akka.Hosting.TestKit` from 1.5.37.2 to 1.5.38
- [Release notes](https://github.com/akkadotnet/Akka.Hosting/releases)
- [Changelog](https://github.com/akkadotnet/Akka.Hosting/blob/dev/RELEASE_NOTES.md)
- [Commits](akkadotnet/Akka.Hosting@1.5.37.2...1.5.38)

Updates `Akka.TestKit.Xunit2` from 1.5.37 to 1.5.38
- [Release notes](https://github.com/akkadotnet/akka.net/releases)
- [Changelog](https://github.com/akkadotnet/akka.net/blob/dev/RELEASE_NOTES.md)
- [Commits](akkadotnet/akka.net@1.5.37...1.5.38)

---
updated-dependencies:
- dependency-name: Akka.Hosting.TestKit
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: Akka.TestKit.Xunit2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

unit-1/completed/AkkaWordCounter2.App.Tests/AkkaWordCounter2.App.Tests.csproj

@@ -9,8 +9,8 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Akka.Hosting.TestKit" Version="1.5.37.2" />
-        <PackageReference Include="Akka.TestKit.Xunit2" Version="1.5.37" />
+        <PackageReference Include="Akka.Hosting.TestKit" Version="1.5.38" />
+        <PackageReference Include="Akka.TestKit.Xunit2" Version="1.5.38" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
           <PrivateAssets>all</PrivateAssets>
           <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>