Bump xunit from 2.9.2 to 2.9.3 in /by-language/csharp-npgsql

Bumps [xunit](https://github.com/xunit/xunit) from 2.9.2 to 2.9.3.
- [Commits](xunit/xunit@v2-2.9.2...v2-2.9.3)

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

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

Author: dependabot[bot]

by-language/csharp-npgsql/demo.csproj

@@ -13,7 +13,7 @@
     <PackageReference Include="Npgsql" Version="9.0.2" />
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
-    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.3" />
   </ItemGroup>