Bump Microsoft.NET.Test.Sdk in /src (finos#118)

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.9.0-preview-23577-04 to 17.9.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](microsoft/vstest@v17.9.0-preview-23577-04...v17.9.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Brian Ingenito <28159742+bingenito@users.noreply.github.com>

src/Tests/Finos.Fdc3.AppDirectory.Tests/Finos.Fdc3.AppDirectory.Tests.csproj

@@ -19,7 +19,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0-preview-23577-04" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.7.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

src/Tests/Finos.Fdc3.NewtonsoftJson.Tests/Finos.Fdc3.NewtonsoftJson.Tests.csproj

@@ -19,7 +19,7 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0-preview-23577-04" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
         <PackageReference Include="Newtonsoft.Json.Schema" Version="3.0.14" />
         <PackageReference Include="xunit" Version="2.7.0" />

src/Tests/Finos.Fdc3.Tests/Finos.Fdc3.Tests.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0-preview-23577-04" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.7.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>