fix: edit messages for cli ref

Author: jshackell-sfdc

messages/package_update.md

@@ -4,13 +4,13 @@ update package details
 
 Specify a new value for each option you want to update.
 
+Run "sfdx force:package:list" to list all packages in the Dev Hub org.
+
 # examples
 
 $ sfdx force:package:update -p "Your Package Alias" -n "New Package Name"
 $ sfdx force:package:update -p 0Ho... -d "New Package Description"
 
-Run "sfdx force:package:list" to list all packages in the Dev Hub org.
-
 # package
 
 ID (starts with 0Ho) or alias of the package to update