Bump Microsoft.NET.Test.Sdk from 18.4.0 to 18.5.1 (#196)

Updated [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest)
from 18.4.0 to 18.5.1.

<details>
<summary>Release notes</summary>

_Sourced from [Microsoft.NET.Test.Sdk's
releases](https://github.com/microsoft/vstest/releases)._

## 18.5.1

## What's Changed
* Fix System.Collections.Immutable binding mismatch in Common.dll
(rel/18.5) by @​nohwnd in microsoft/vstest#15720
* Port verify-binding-redirects.ps1 to rel/18.5 by @​nohwnd in
microsoft/vstest#15719
* Bump to 18.5.1 by @​nohwnd in
microsoft/vstest#15721


**Full Changelog**:
microsoft/vstest@v18.5.0...v18.5.1

## 18.5.0

⚠️ Unlisted on Nuget, because of #​15718 

## What's Changed
* Add runtime configs by @​nohwnd in
microsoft/vstest#15377
* Add net8.0 target for TranslationLayer by @​nohwnd in
microsoft/vstest#15375
* Determine architecture of remote process on windows by @​nohwnd in
microsoft/vstest#15396
* Updating System.Collections.Immutable package reference to version
9.0.0 by @​MSLukeWest in microsoft/vstest#15392
* Dump via netcore tool on windows by @​nohwnd in
microsoft/vstest#15397
* Fix answer file splitting by @​nohwnd in
microsoft/vstest#15381
* Run tests against vsix runner by @​nohwnd in
microsoft/vstest#15419

**Full Changelog**:
microsoft/vstest@v18.4.0...v18.5.0

Commits viewable in [compare
view](microsoft/vstest@v18.4.0...v18.5.1).
</details>

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Directory.Packages.props

@@ -7,7 +7,7 @@
     <PackageVersion Include="Microsoft.Build" Version="18.4.0" />
     <PackageVersion Include="Microsoft.Build.Locator" Version="1.11.2" />
     <PackageVersion Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="10.0.203" />
-    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="10.0.203" />
     <PackageVersion Include="Moq" Version="4.20.72" />
     <PackageVersion Include="xunit" Version="2.9.3" />