docs: fix misleading statement about what scope a role can be created (#798)

website/content/docs/concepts/domain-model/roles.mdx

@@ -13,7 +13,7 @@ that contains a collection of [permissions][]
 which are granted to any principal assigned to the role.
 [Users][] and [groups][] are principals
 which allows either to be assigned to a role.
-A role can only be defined within a [project][] [scope][].
+A role can be defined within any [scope][].
 A role can be assigned to principals from any scope.
 
 ## Attributes
@@ -43,4 +43,4 @@ A role has the following configurable attributes:
 
 The following services are relevant to this resource:
 
-* [Role Service](/api-docs/role-service)
+* [Role Service](/api-docs/role-service)