chore(deps): update dependency graphql to v8

Author: renovate[bot]

implementations/graphql-dotnet/ApolloFederation.SubgraphCompatibility.Products.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="GraphQL.Server.Transports.AspNetCore" Version="7.2.0" />
     <PackageReference Include="GraphQL.SystemTextJson" Version="7.2.2" />
-    <PackageReference Include="GraphQL" Version="7.2.2" />
+    <PackageReference Include="GraphQL" Version="8.4.1" />
   </ItemGroup>
 
   <ItemGroup>