feat(ruby): add multiple `gem` aliases (#9005)

Mostly empty commit to fix the changelog for merge at 6f4c7f64

plugins/ruby/README.md

@@ -29,4 +29,3 @@ plugins=(... ruby)
 | gl    | `gem lock`                             | Generate a lockdown list of gems                     |
 | go    | `gem open`                             | Open gem source in default editor                    |
 | goe   | `gem open -e`                          | Open gem sources in preferred editor                 |
-

plugins/ruby/ruby.plugin.zsh

-# TODO: Make this compatible with rvm.
-#       Run sudo gem on the system ruby, not the active ruby.
+# Run sudo gem on the system ruby, not the active ruby
 alias sgem='sudo gem'
 
 # Find ruby file