[ZSH] Add completion rehash

zsh/.zshrc

@@ -18,6 +18,9 @@ fi
 
 zstyle ':completion:*:ssh:*' hosts off
 zstyle ':completion:*:scp:*' hosts off
+
+# Run rehash for external commands
+zstyle ":completion:*:commands" rehash 1
 # source antidote and load plugins from `${ZDOTDIR:-~}/.zsh_plugins.txt`
 source ${ZDOTDIR:-~}/.antidote/antidote.zsh
 antidote load ${plugins_txt} ${static_file}