Update readme. (#106)

Author: efritz

README.md

@@ -18,7 +18,7 @@ If there is something you'd like to see Sourcegraph be able to do from the CLI,
 
 ## Installation
 
-**NOTE:** To get the best version for _your_ Sourcegraph instance, simply replace `sourcegraph.com` in the commands below with your own Sourcegraph URL and the latest version compatible with your instance will be provided. If you are running a Sourcegraph version older than 3.12, run the commands below instead.
+**NOTE:** To get the best version for _your_ Sourcegraph instance, simply replace `sourcegraph.com` in the commands below with your own Sourcegraph URL and the latest version compatible with your instance will be provided. If you are running a Sourcegraph version older than 3.13, run the commands below instead.
 
 #### Mac OS