Bump FsCheck.Xunit from 3.0.0-alpha4 to 3.0.0-beta2

Bumps [FsCheck.Xunit](https://github.com/fsharp/FsCheck) from 3.0.0-alpha4 to 3.0.0-beta2.
- [Release notes](https://github.com/fsharp/FsCheck/releases)
- [Changelog](https://github.com/fscheck/FsCheck/blob/3.0.0-beta2/FsCheck%20Release%20Notes.md)
- [Commits](fscheck/FsCheck@3.0.0-alpha4...3.0.0-beta2)

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

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

tests/AED.Test/AED.Test.fsproj

@@ -26,7 +26,7 @@
         <PackageReference Include="System.IO.FileSystem" Version="4.3.0" />
         <PackageReference Include="FSharp.Core" Version="5.0.0" />
         <PackageReference Include="FsCheck" Version="3.0.0-alpha4" />
-        <PackageReference Include="FsCheck.Xunit" Version="3.0.0-alpha4" />
+        <PackageReference Include="FsCheck.Xunit" Version="3.0.0-beta2" />
         <PackageReference Include="FsUnit.xUnit" Version="4.0.2" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.0" />
         <PackageReference Include="coverlet.collector" Version="1.3.0">