Bump GraphQL.Client.Serializer.Newtonsoft from 6.0.0 to 6.0.2

Bumps [GraphQL.Client.Serializer.Newtonsoft](https://github.com/graphql-dotnet/graphql-client) from 6.0.0 to 6.0.2.
- [Release notes](https://github.com/graphql-dotnet/graphql-client/releases)
- [Commits](graphql-dotnet/graphql-client@v6.0.0...v6.0.2)

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

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

Author: dependabot[bot]

SimpleXamarinGraphQL/SimpleXamarinGraphQL.csproj

@@ -15,7 +15,7 @@
         <PackageReference Include="Polly" Version="8.2.0" />
         <PackageReference Include="modernhttpclient-updated" Version="3.4.3" />
         <PackageReference Include="Xamarin.Essentials" Version="1.8.1" />
-        <PackageReference Include="GraphQL.Client.Serializer.Newtonsoft" Version="6.0.0" />
+        <PackageReference Include="GraphQL.Client.Serializer.Newtonsoft" Version="6.0.2" />
         <PackageReference Include="Xamarin.CommunityToolkit.Markup" Version="2.0.6" />
     </ItemGroup>
     <ItemGroup>