Bump xunit.extensibility.core from 2.5.1 to 2.5.3 in /src

Bumps [xunit.extensibility.core](https://github.com/xunit/xunit) from 2.5.1 to 2.5.3.
- [Commits](https://github.com/xunit/xunit/commits)

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

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="6.10.0" />
-    <PackageReference Include="xunit.extensibility.core" Version="2.5.1" />
+    <PackageReference Include="xunit.extensibility.core" Version="2.5.3" />
     <PackageReference Include="xunit.extensibility.execution" Version="2.5.1" />
   </ItemGroup>
 </Project>