Bump xunit from 2.6.1 to 2.6.3 in /telemetry/csharp

Bumps [xunit](https://github.com/xunit/xunit) from 2.6.1 to 2.6.3.
- [Commits](xunit/xunit@2.6.1...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]

telemetry/csharp/AwsToolkit.Telemetry.Events.Generator.Tests/AwsToolkit.Telemetry.Events.Generator.Tests.csproj

@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="xunit" Version="2.6.1" />
+    <PackageReference Include="xunit" Version="2.6.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

telemetry/csharp/AwsToolkit.Telemetry.Events.Tests/AwsToolkit.Telemetry.Events.Tests.csproj

@@ -12,7 +12,7 @@
 	</ItemGroup>
   <ItemGroup>
     <PackageReference Include="Moq" Version="4.18.4" />
-    <PackageReference Include="xunit" Version="2.6.1" />
+    <PackageReference Include="xunit" Version="2.6.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>