More clarity in the readme

Author: fsbraun

README.rst

@@ -98,8 +98,8 @@ adding the following to your settings::
     DJANGOCMS_SNIPPET_VERSIONING = True  # Set to version with djangocms-versioning
     DJANGOCMS_SNIPPET_MODERATION = True  # Set to moderate with djangocms-moderation
 
-When adding versioning to djangocms-snippets, you will need to create ``Version`` objects using
-djangocms-versioning's ``create_version`` management command.
+When adding versioning to djangocms-snippets, you will need to create ``Version`` objects for existing snippets
+using djangocms-versioning's ``create_version`` management command.
 
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