fix(virtualenv): quote % in `virtualenv_prompt_info`

plugins/virtualenv/virtualenv.plugin.zsh

@@ -1,6 +1,6 @@
 function virtualenv_prompt_info(){
   [[ -n ${VIRTUAL_ENV} ]] || return
-  echo "${ZSH_THEME_VIRTUALENV_PREFIX=[}${VIRTUAL_ENV:t}${ZSH_THEME_VIRTUALENV_SUFFIX=]}"
+  echo "${ZSH_THEME_VIRTUALENV_PREFIX=[}${VIRTUAL_ENV:t:gs/%/%%}${ZSH_THEME_VIRTUALENV_SUFFIX=]}"
 }
 
 # disables prompt mangling in virtual_env/bin/activate