chore(deps): bump System.Reactive from 5.0.0 to 6.0.0

Bumps [System.Reactive](https://github.com/dotnet/reactive) from 5.0.0 to 6.0.0.
- [Release notes](https://github.com/dotnet/reactive/releases)
- [Commits](https://github.com/dotnet/reactive/commits)

---
updated-dependencies:
- dependency-name: System.Reactive
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Diff for: Client/Client.csproj

@@ -40,7 +40,7 @@
         <PackageReference Include="Microsoft.Net.Http.Headers" Version="2.2.8" />
         <PackageReference Include="System.Collections.Immutable" Version="6.0.0" />
         <PackageReference Include="System.Configuration.ConfigurationManager" Version="6.0.1" />
-        <PackageReference Include="System.Reactive" Version="5.0.0" />
+        <PackageReference Include="System.Reactive" Version="6.0.0" />
     </ItemGroup>
 
 </Project>