Merge pull request nodejs#2418 from MikeMcC399/update-remove-b-option-help

fix: remove b option from update.sh help

Author: sxa

update.sh

@@ -21,7 +21,6 @@ function usage() {
 
   OPTIONS:
     -s Security update; skip updating the yarn and alpine versions.
-    -b CI config update only
     -h Show this message
 
 EOF