Changed punctuation for consistency

Author: rrelledge

content/operate/rs/release-notes/rs-7-8-releases/rs-7-8-4-18.md

@@ -106,7 +106,7 @@ The following table shows which Redis modules are compatible with each Redis dat
 
 - RS136270: Changed the owner and group of the `rlec_supervisor.service` file to `root:root` instead of `redislabs:redislabs` to improve security.
 
-- RS142166 - Fixed the representation of available RAM.
+- RS142166: Fixed the representation of available RAM.
 
 ## Version changes