deps: Bump xunit from 2.4.2 to 2.9.3

---
updated-dependencies:
- dependency-name: xunit
  dependency-version: 2.9.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Oproto.Lambda.OpenApi.Tests/Oproto.Lambda.OpenApi.Tests.csproj

@@ -17,7 +17,7 @@
         <PackageReference Include="Microsoft.OpenApi" Version="1.6.22"/>
         <PackageReference Include="Microsoft.OpenApi.Readers" Version="1.6.22"/>
         <PackageReference Include="NSubstitute" Version="5.3.0"/>
-        <PackageReference Include="xunit" Version="2.4.2"/>
+        <PackageReference Include="xunit" Version="2.9.3"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>