Bump xunit from 2.5.2 to 2.5.3

Bumps [xunit](https://github.com/xunit/xunit) from 2.5.2 to 2.5.3.
- [Commits](https://github.com/xunit/xunit/commits)

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

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

VaughanTests/VaughanTests.fsproj

@@ -24,7 +24,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.5.2" />
+    <PackageReference Include="xunit" Version="2.5.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
     <PackageReference Include="FsCheck.Xunit" Version="2.16.6" />
     <PackageReference Include="FsUnit.xUnit" Version="5.4.0" />