Update app-gum.sh

Fix install breakage. Better patch needed.

Author: dhh

install/terminal/required/app-gum.sh

@@ -1,6 +1,6 @@
 # Gum is used for the Omakub commands for tailoring Omakub after the initial install
 cd /tmp
-GUM_VERSION="0.14.1" # Use known good version
+GUM_VERSION="0.14.3" # Use known good version
 wget -qO gum.deb "https://github.com/charmbracelet/gum/releases/latest/download/gum_${GUM_VERSION}_amd64.deb"
 sudo apt-get install -y ./gum.deb
 rm gum.deb