ci: add supported and graduated topic (#369)

Author: ocofaigh

.github/settings.yml

@@ -24,4 +24,4 @@ repository:
   # and update the description to the current repo description.
   description: "This module can be used to provision and configure Context Based Restrictions."
 
-  topics: core-team, terraform, ibm-cloud, terraform-module, cbr, context-based-restrictions
+  topics: core-team, terraform, ibm-cloud, terraform-module, cbr, context-based-restrictions, graduated, supported