revise webui.sh

Author: xieyongliang

webui.sh

@@ -81,7 +81,7 @@ printf "\e[1m\e[32mInstall script for stable-diffusion + Web UI\n"
 printf "\e[1m\e[34mTested on Debian 11 (Bullseye)\e[0m"
 printf "\n%s\n" "${delimiter}"
 
-if [[ -d .git ]]
+if [ -f .git -o -d .git ]
 then
     printf "\n%s\n" "${delimiter}"
     printf "Repo already cloned, using it as install directory"