Merge pull request #616 from luckyraul/patch-1

Support for Linux Mint 21

Author: mhashizume

tasks/install_shell.sh

@@ -631,6 +631,8 @@ case $platform in
     case $major_version in
       "3")  deb_codename="stretch";;
       "4")  deb_codename="buster";;
+      "5")  deb_codename="bullseye";;
+      "21") deb_codename="jammy";;
       "20") deb_codename="focal";;
       "19") deb_codename="bionic";;
       "18") deb_codename="xenial";;