Update dependency xunit to 2.9.3

Author: renovate[bot]

Vacuum.Tests/Vacuum.Tests.fsproj

@@ -20,7 +20,7 @@ SPDX-License-Identifier: MIT
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
         <PackageReference Include="NCode.ReparsePoints" Version="1.0.2" />
-        <PackageReference Include="xunit" Version="2.9.2" />
+        <PackageReference Include="xunit" Version="2.9.3" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.0.0" />
         <ProjectReference Include="..\Vacuum\Vacuum.fsproj" />
     </ItemGroup>