Bump GraphQL.Client from 4.0.2 to 5.1.1

Bumps [GraphQL.Client](https://github.com/graphql-dotnet/graphql-client) from 4.0.2 to 5.1.1.
- [Release notes](https://github.com/graphql-dotnet/graphql-client/releases)
- [Commits](graphql-dotnet/graphql-client@v4.0.2...v5.1.1)

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

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

thorn/thorn.csproj

@@ -10,7 +10,7 @@
         <PackageReference Include="Discord.Addons.Hosting" Version="5.1.0" />
         <PackageReference Include="Discord.Addons.Preconditions" Version="2.2.0-dev3" />
         <PackageReference Include="Discord.Net" Version="3.4.1" />
-        <PackageReference Include="GraphQL.Client" Version="4.0.2" />
+        <PackageReference Include="GraphQL.Client" Version="5.1.1" />
         <PackageReference Include="GraphQL.Client.Serializer.Newtonsoft" Version="4.0.2" />
         <PackageReference Include="Html2Markdown" Version="5.0.2.561" />
         <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0" />