Fix OpenStruct use

Fixed OpenStruct use as Ruby 3 discourages it

Changelog: other

.rubocop_manual_todo.yml

@@ -2605,7 +2605,6 @@ Style/OpenStructUse:
     - 'spec/models/design_management/design_at_version_spec.rb'
     - 'spec/models/user_spec.rb'
     - 'spec/presenters/packages/nuget/search_results_presenter_spec.rb'
-    - 'spec/requests/api/import_github_spec.rb'
     - 'spec/services/packages/nuget/metadata_extraction_service_spec.rb'
     - 'spec/services/projects/import_service_spec.rb'
     - 'spec/services/system_note_service_spec.rb'

spec/requests/api/import_github_spec.rb

@@ -11,12 +11,12 @@ RSpec.describe API::ImportGithub do
     let(:user) { create(:user) }
     let(:project) { create(:project) }
     let(:provider_username) { user.username }
-    let(:provider_user) { OpenStruct.new(login: provider_username) }
+    let(:provider_user) { double('provider', login: provider_username) }
     let(:provider_repo) do
-      OpenStruct.new(
+      double('provider',
         name: 'vim',
         full_name: "#{provider_username}/vim",
-        owner: OpenStruct.new(login: provider_username)
+        owner: double('provider', login: provider_username)
       )
     end