Update RepositoryCloneService.cs

Add link with more info about affiliations and ownerAffiliations 
https://platform.github.community/t/unable-to-fetch-users-repositories-by-organization-membership/7557/6

Author: jcansdale

src/GitHub.App/Services/RepositoryCloneService.cs

@@ -93,6 +93,7 @@ public async Task<ViewerRepositoriesModel> ReadViewerRepositories(HostAddress ad
                         // We should pass affiliations and ownerAffiliations the same RepositoryAffiliation?[], but
                         // ownerAffiliations doesn't currently exist on GitHub Enterprise. Luckily the default is
                         // Owner and Collaborator, which is what we need in this case (we can simply pass null).
+                        // See https://platform.github.community/t/unable-to-fetch-users-repositories-by-organization-membership/7557/6
                         Repositories = viewer.Repositories(null, null, null, null, null, null, null, order, null, null)
                             .AllPages()
                             .Select(repositorySelection).ToList(),