Bump xunit.extensibility.execution and xunit.extensibility.core in /src

Bumps xunit.extensibility.execution and xunit.extensibility.core. These dependencies needed to be updated together.

Updates `xunit.extensibility.execution` from 2.8.1 to 2.9.0

Updates `xunit.extensibility.core` from 2.8.1 to 2.9.0

---
updated-dependencies:
- dependency-name: xunit.extensibility.execution
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: xunit.extensibility.core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

src/IoTHub.Portal.Shared/IoTHub.Portal.Shared.csproj

@@ -28,7 +28,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="MudBlazor" Version="6.20.0" />
-    <PackageReference Include="xunit.extensibility.core" Version="2.8.1" />
-    <PackageReference Include="xunit.extensibility.execution" Version="2.8.1" />
+    <PackageReference Include="xunit.extensibility.core" Version="2.9.0" />
+    <PackageReference Include="xunit.extensibility.execution" Version="2.9.0" />
   </ItemGroup>
 </Project>