Bump System.Reactive from 6.0.0 to 6.0.1

Bumps [System.Reactive](https://github.com/dotnet/reactive) from 6.0.0 to 6.0.1.
- [Release notes](https://github.com/dotnet/reactive/releases)
- [Commits](https://github.com/dotnet/reactive/commits/ixnet-v6.0.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

samples/Samples.MultipleSchemas/Samples.MultipleSchemas.csproj

@@ -9,7 +9,7 @@
   <ItemGroup>
     <ProjectReference Include="..\..\src\Transports.AspNetCore\Transports.AspNetCore.csproj" />
     <ProjectReference Include="..\..\src\Ui.GraphiQL\Ui.GraphiQL.csproj" />
-    <PackageReference Include="System.Reactive" Version="6.0.0" />
+    <PackageReference Include="System.Reactive" Version="6.0.1" />
     <Using Include="GraphQL" />
     <Using Include="GraphQL.Types" />
   </ItemGroup>

samples/Samples.Schemas.Chat/Samples.Schemas.Chat.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="GraphQL" Version="$(GraphQLVersion)" />
-    <PackageReference Include="System.Reactive" Version="6.0.0" />
+    <PackageReference Include="System.Reactive" Version="6.0.1" />
   </ItemGroup>
 
   <ItemGroup>