build(deps): bump xunit.core from 2.5.1 to 2.5.2

Bumps [xunit.core](https://github.com/xunit/xunit) from 2.5.1 to 2.5.2.
- [Commits](xunit/xunit@2.5.1...2.5.2)

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

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

Directory.Packages.props

@@ -16,7 +16,7 @@
     <PackageVersion Include="Polyfill" Version="1.29.0" />
     <PackageVersion Include="Verify.Xunit" Version="22.1.3" />
     <PackageVersion Include="xunit" Version="2.5.1" />
-    <PackageVersion Include="xunit.core" Version="2.5.1" />
+    <PackageVersion Include="xunit.core" Version="2.5.2" />
     <PackageVersion Include="xunit.runner.console" Version="2.5.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.4.5" />
   </ItemGroup>