fix: Use -L to check for symlinks in conditional expressions (#12457)

This avoids conflicting with a somewhat common global `-h` alias
recommended by [`bat`](https://github.com/sharkdp/bat?tab=readme-ov-file#highlighting---help-messages)

Fixes #12457

plugins/chruby/chruby.plugin.zsh

@@ -20,7 +20,7 @@ _source-from-homebrew() {
 
   local _brew_prefix
   # check default brew prefix
-  if [[ -h /usr/local/opt/chruby ]];then
+  if [[ -L /usr/local/opt/chruby ]];then
     _brew_prefix="/usr/local/opt/chruby"
   else
     # ok , it is not default prefix

plugins/rbfu/rbfu.plugin.zsh

@@ -18,7 +18,7 @@ function _rbfu_rubies_print() {
   rb_out="$rb"
 
   # If the ruby is a symlink, add @ to the name.
-  if [[ -h "$1" ]]; then
+  if [[ -L "$1" ]]; then
     rb_out="${rb_out}${fg[green]}@${reset_color}"
   fi