Update attributes.adoc (#1140)

Author: Gerry-Forde

artifacts/attributes.adoc

@@ -10,6 +10,8 @@
 :product: Red Hat Developer Hub
 :product-short: Developer Hub
 :product-very-short: RHDH
+:product-local: Red Hat Developer Hub Local
+:product-local-very-short: RHDH Local
 :product-version: 1.6
 :product-bundle-version: 1.6.0
 :product-chart-version: 1.6.0