Build(deps): Bump xunit in /PreMailer.Net/PreMailer.Net.Tests

Bumps [xunit](https://github.com/xunit/xunit) from 2.6.1 to 2.6.2.
- [Commits](xunit/xunit@2.6.1...2.6.2)

---
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]

PreMailer.Net/PreMailer.Net.Tests/PreMailer.Net.Tests.csproj

@@ -9,7 +9,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Moq" Version="4.20.69" />
-    <PackageReference Include="xunit" Version="2.6.1" />
+    <PackageReference Include="xunit" Version="2.6.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
   </ItemGroup>