docs(lib/directories): comment how to disable alias (#11489)

lib/directories.zsh

@@ -3,6 +3,11 @@ setopt auto_pushd
 setopt pushd_ignore_dups
 setopt pushdminus
 
+# add (uncommented):
+# zstyle ':omz:directories' aliases no
+# to your `zshrc` before loading `oh-my-zsh.sh`
+# to disable the following aliases and functions
+
 zstyle -T ':omz:directories' aliases || return
 
 alias -g ...='../..'