Bump xunit from 2.6.3 to 2.6.4 in /dotnet

Bumps [xunit](https://github.com/xunit/xunit) from 2.6.3 to 2.6.4.
- [Commits](xunit/xunit@2.6.3...2.6.4)

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

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

dotnet/Directory.Packages.props

@@ -46,7 +46,7 @@
     <PackageVersion Include="Moq" Version="[4.18.4]" />
     <PackageVersion Include="System.Threading.Channels" Version="8.0.0" />
     <PackageVersion Include="System.Threading.Tasks.Dataflow" Version="8.0.0" />
-    <PackageVersion Include="xunit" Version="2.6.3" />
+    <PackageVersion Include="xunit" Version="2.6.4" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.5" />
     <PackageVersion Include="xretry" Version="1.9.0" />
     <PackageVersion Include="coverlet.collector" Version="6.0.0" />
@@ -91,7 +91,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageVersion Include="xunit.analyzers" Version="1.7.0" />
+    <PackageVersion Include="xunit.analyzers" Version="1.8.0" />
     <PackageReference Include="xunit.analyzers">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>