Update docs/reference/ocm_set_pubsub.md

Co-authored-by: Fabian Burth <[email protected]>

docs/reference/ocm_set_pubsub.md

@@ -23,7 +23,7 @@ pubsub, ps
 
 
 A repository may be able to store a publish/subscribe specification
-to propagate the creation or update of component version.
+to propagate the creation or update of component versions.
 If such an implementation is available this command can be used
 to set the pub/sub specification for a repository.
 If no specification is given an existing specification