add-missing-attributes - Update attributes in release-1.8 (#1505)

Author: Gerry-Forde

artifacts/attributes.adoc

@@ -168,6 +168,8 @@
 :upgrading-book-title: Upgrading {product}
 :using-dynamic-plugins-book-link: {product-docs-link}/html-single/installing_and_viewing_plugins_in_red_hat_developer_hub/index
 :using-dynamic-plugins-book-title: Using dynamic plugins
+:plugin-type-name: custom
+:plugin-type-name-uppercase: Custom
 
 :scorecard-plugin-book-link: {product-docs-link}/html-single/understand_and_visualize_red_hat_developer_hub_project_health_using_scorecards/index
 :scorecard-plugin-book-title: Understand and visualize {product} project health using Scorecards