build(deps): Bump GraphQL and GraphQL.MicrosoftDI

Bumps [GraphQL](https://github.com/graphql-dotnet/graphql-dotnet) and [GraphQL.MicrosoftDI](https://github.com/graphql-dotnet/graphql-dotnet). These dependencies needed to be updated together.

Updates `GraphQL` from 8.3.1 to 8.4.0
- [Release notes](https://github.com/graphql-dotnet/graphql-dotnet/releases)
- [Commits](graphql-dotnet/graphql-dotnet@8.3.1...8.4.0)

Updates `GraphQL.MicrosoftDI` from 8.2.1 to 8.4.0
- [Release notes](https://github.com/graphql-dotnet/graphql-dotnet/releases)
- [Commits](graphql-dotnet/graphql-dotnet@8.2.1...8.4.0)

---
updated-dependencies:
- dependency-name: GraphQL
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: GraphQL.MicrosoftDI
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

GraphQLNetExample/GraphQLNetExample.csproj

@@ -7,8 +7,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="GraphQL" Version="8.3.1" />
-    <PackageReference Include="GraphQL.MicrosoftDI" Version="8.2.1" />
+    <PackageReference Include="GraphQL" Version="8.4.0" />
+    <PackageReference Include="GraphQL.MicrosoftDI" Version="8.4.0" />
     <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="8.0.3" />
     <PackageReference Include="GraphQL.Server.Ui.Altair" Version="8.2.0" />
     <PackageReference Include="GraphQL.SystemTextJson" Version="8.3.1" />