Update msys updater script

dotfiles/bin/update-msys-shell

@@ -11,7 +11,7 @@ if [[ -d "/c/msys64" ]]; then
     shell_is_mingw is_mingw
     if [[ $is_mingw -eq 1 ]]; then
         printf "${BOLD}${YELLOW}Updating MinGW Shell${NORMAL}\n"
-        pacman -Syu
+        pacman --sync --refresh --sysupgrade
         printf "${BOLD}${GREEN}Done!${NORMAL}\n"
         printf "\n${BOLD}Re-run this in a new shell if the updater requires the shells to be closed.\n"
     else