Bump GraphQL.Client.Serializer.Newtonsoft from 4.0.2 to 6.0.0

Bumps [GraphQL.Client.Serializer.Newtonsoft](https://github.com/graphql-dotnet/graphql-client) from 4.0.2 to 6.0.0.
- [Release notes](https://github.com/graphql-dotnet/graphql-client/releases)
- [Commits](graphql-dotnet/graphql-client@v4.0.2...v6.0.0)

---
updated-dependencies:
- dependency-name: GraphQL.Client.Serializer.Newtonsoft
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

csharp/TraderBot/TraderBot.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.Worker">
+<Project Sdk="Microsoft.NET.Sdk.Worker">
 
     <PropertyGroup>
         <TargetFramework>net6.0</TargetFramework>
@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="GraphQL.Client.Serializer.Newtonsoft" Version="4.0.2" />
+        <PackageReference Include="GraphQL.Client.Serializer.Newtonsoft" Version="6.0.0" />
         <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />
         <PackageReference Include="Platform.Data.Doublets.Sequences" Version="0.1.1" />
         <PackageReference Include="Tinkoff.InvestApi" Version="0.5.0" />