Bump xunit from 2.6.2 to 2.6.3 in /by-language/csharp-npgsql

Bumps [xunit](https://github.com/xunit/xunit) from 2.6.2 to 2.6.3.
- [Commits](xunit/xunit@2.6.2...2.6.3)

---
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

@@ -12,7 +12,7 @@
     <PackageReference Include="Npgsql" Version="7.0.6" />
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="xunit" Version="2.6.2" />
+    <PackageReference Include="xunit" Version="2.6.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.5" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
   </ItemGroup>