Bump FsUnit.xUnit in the test-lib group across 1 directory

Bumps the test-lib group with 1 update in the / directory: [FsUnit.xUnit](https://github.com/fsprojects/FsUnit).


Updates `FsUnit.xUnit` from 6.0.1 to 7.0.1
- [Release notes](https://github.com/fsprojects/FsUnit/releases)
- [Changelog](https://github.com/fsprojects/FsUnit/blob/master/RELEASE_NOTES.md)
- [Commits](fsprojects/FsUnit@6.0.1...7.0.1)

---
updated-dependencies:
- dependency-name: FsUnit.xUnit
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: test-lib
...

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

src/pocof.Test/pocof.Test.fsproj

@@ -24,7 +24,7 @@
   <ItemGroup>
     <!-- NOTE: FsCheck.Xunit does not support xUnit.v3 yet. -->
     <PackageReference Include="FsCheck.Xunit" Version="3.0.1" />
-    <PackageReference Include="FsUnit.xUnit" Version="6.0.1" />
+    <PackageReference Include="FsUnit.xUnit" Version="7.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
     <!-- NOTE: Replace xunit with xunit.v3 from FsUnit.xUnit 7. -->
     <PackageReference Include="xunit" Version="2.9.3" />