api: clarify suggestions in is_supported_system

upgrades are not validated, recommended, or supported in many of the suggested distros so change that wording to say "install" to not potentially confuse users into thinking that upgrades are possible or recommended

api

@@ -2585,13 +2585,16 @@ apt.armbian.com")"
     echo "Pi-Apps is not supported on WSL."
     return 1
   elif ([ "$__os_id" == "Debian" ] || [ "$__os_id" == "Raspbian" ]) && [ -f /etc/rpi-issue ] && [ "$__os_release" == 10 ]; then
-    echo "Pi-Apps is no longer supported on your Pi OS Buster operating system. Consider upgrading to Pi OS Bookworm. https://www.raspberrypi.com/news/bookworm-the-new-version-of-raspberry-pi-os/"
+    echo "Pi-Apps is no longer supported on your Pi OS ${__os_codename^} operating system. Consider installing Pi OS Bookworm. https://www.raspberrypi.com/news/bookworm-the-new-version-of-raspberry-pi-os/"
     return 1
-  elif ([ "$__os_id" == "Debian" ] || [ "$__os_id" == "Raspbian" ]) && ! printf '%s\n' "11" "$__os_release" | sort -CV ; then
-    echo "Pi-Apps is not supported on your outdated $__os_id $__os_release operating system. Expect many apps to fail. Consider upgrading your operating system."
+  elif ([ "$__os_id" == "Debian" ] || [ "$__os_id" == "Raspbian" ]) && [ "$__os_release" -lt 11 ]; then
+    echo "Pi-Apps is not supported on your outdated ${__os_id^} ${__os_codename^} operating system. Expect many apps to fail. Consider installing a newer operating system."
+    return 1
+  elif [ "$__os_id" == "Ubuntu" ] && [ "$__os_release" == "18.04" ] && [ -f /etc/switchroot_version.conf ]; then
+    echo "Pi-Apps is no longer supported on your outdated Switchroot ${__os_id^} ${__os_codename^} operating system. Consider installing Switchroot Ubuntu Jammy. https://wiki.switchroot.org/wiki/linux/l4t-ubuntu-jammy-installation-guide"
     return 1
   elif [ "$__os_id" == "Ubuntu" ] && ! printf '%s\n' "20.04" "$__os_release" | sort -CV ; then
-    echo "Pi-Apps is not supported on your outdated $__os_id $__os_release operating system. Expect many apps to fail. Consider upgrading your operating system."
+    echo "Pi-Apps is not supported on your outdated ${__os_id^} ${__os_codename^} operating system. Expect many apps to fail. Consider installing a newer operating system."
     return 1
   elif echo "$PRETTY_NAME" | grep -qi 'manjaro'; then
     echo "Pi-Apps is not supported on Manjaro."