Bump xunit from 2.4.1 to 2.9.3

Bumps [xunit](https://github.com/xunit/xunit) from 2.4.1 to 2.9.3.
- [Commits](xunit/xunit@v2-2.4.1...v2-2.9.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

OpenAPI/LearningHub.Nhs.OpenApi.Tests/LearningHub.Nhs.OpenApi.Tests.csproj

@@ -13,7 +13,7 @@
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
         <PackageReference Include="Moq" Version="4.20.72" />
         <PackageReference Include="NBuilder" Version="6.1.0" />
-        <PackageReference Include="xunit" Version="2.4.1" />
+        <PackageReference Include="xunit" Version="2.9.3" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>