SCS: Fix incorrect docs for data.ccCompositeIdentifier.vobs (#309)

The member is named data.ccCompositeIdentifier.vobs in the schema but
the documentation calls it data.ccCompositeIdentifier.vob, i.e. singular
instead of plural.

eiffel-vocabulary/EiffelSourceChangeSubmittedEvent.md

@@ -103,7 +103,7 @@ __Type:__ Object
 __Required:__ No  
 __Description:__ Identifier of a composite ClearCase change – in other words, not single file commit, but analogous of repository-wide commits of e.g. SVN or Git.
 
-#### data.ccCompositeIdentifier.vob
+#### data.ccCompositeIdentifier.vobs
 __Type:__ String[]  
 __Required:__ Yes  
 __Description:__ The names of the changed ClearCase VOBs.