build(deps): bump GraphQL.Server.Transports.AspNetCore

Bumps [GraphQL.Server.Transports.AspNetCore](https://github.com/graphql-dotnet/server) from 5.1.1 to 7.6.0.
- [Release notes](https://github.com/graphql-dotnet/server/releases)
- [Commits](graphql-dotnet/server@5.1.1...7.6.0)

---
updated-dependencies:
- dependency-name: GraphQL.Server.Transports.AspNetCore
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

NineChronicles.Headless/NineChronicles.Headless.csproj

@@ -30,7 +30,7 @@
   <ItemGroup>
     <PackageReference Include="AspNetCoreRateLimit" Version="5.0.0" />
     <PackageReference Include="GraphQL.Server.Authorization.AspNetCore" Version="5.1.1" />
-    <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="5.1.1" />
+    <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="7.6.0" />
     <PackageReference Include="GraphQL.Server.Transports.AspNetCore.SystemTextJson" Version="5.1.1" />
     <PackageReference Include="GraphQL.Server.Transports.Subscriptions.WebSockets" Version="5.1.1" />
     <PackageReference Include="GraphQL.Server.Ui.Playground" Version="5.1.1" />