Bump xunit from 2.9.2 to 2.9.3

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

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

Author: dependabot[bot]

test/AStar.Dev.Api.Usage.Sdk.Tests.Unit/AStar.Dev.Api.Usage.Sdk.Tests.Unit.csproj

@@ -12,7 +12,7 @@
         <PackageReference Include="JetBrains.Annotations" Version="2025.2.2"/>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0"/>
         <PackageReference Include="Shouldly" Version="4.3.0"/>
-        <PackageReference Include="xunit" Version="2.9.2"/>
+        <PackageReference Include="xunit" Version="2.9.3"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2"/>
     </ItemGroup>