build(deps): Bump Microsoft.TestPlatform.TestHost from 17.8.0 to 17.9.0 (#335)

Author: dependabot[bot]

Directory.Packages.props

@@ -18,7 +18,7 @@
     <PackageVersion Include="coverlet.collector" Version="6.0.0" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageVersion Include="Microsoft.TestPlatform.TestHost" Version="17.8.0" />
+    <PackageVersion Include="Microsoft.TestPlatform.TestHost" Version="17.9.0" />
     <PackageVersion Include="MSTest.TestAdapter" Version="3.2.0" />
     <PackageVersion Include="MSTest.TestFramework" Version="3.2.0" />
     <PackageVersion Include="NUnit" Version="4.0.1" />