Update rtsetup

Use latest release instead of tag

rtsetup

@@ -57,7 +57,7 @@ if [ -d /etc/rtinst ] && [ -z $branch ]; then
   if [ -z $branch ]; then
     branch=$(git describe --tags --exact-match)
     if [ ${branch:0:1} = v ]; then
-      latest=$(basename "$(git ls-remote --tags https://github.com/arakasi72/rtinst.git | grep -o 'refs/tags/v.*' | sort -V | tail -1)")
+      latest=$(curl -s "https://api.github.com/repos/arakasi72/rtinst/releases/latest" | awk -F '"' '/tag_name/{print $4}')
       if [ $branch != $latest ]; then
         echo "Updating from $branch to $latest"
         branch=$latest