OLS-1756: fixed spacing in attributes file

Author: rh-tokeefe

_attributes/common-attributes.adoc

@@ -17,7 +17,7 @@
 :ove-first: Red Hat OpenShift Virtualization Engine
 :ove: OpenShift Virtualization Engine
 :oke-first: Red Hat OpenShift Kubernetes Engine
-:oke:OpenShift Kubernetes Engine
+:oke: OpenShift Kubernetes Engine
 :opp-first: Red Hat OpenShift Platform Plus
 :opp: OpenShift Platform Plus
 // OC CLI