Return the exit code from the last command after forcing update to main branch (GhostWriters#2010)

Author: CLHatch

main.sh

@@ -388,7 +388,7 @@ switch_branch() {
         export FORCE
         PROMPT="CLI"
         run_script 'update_self' "${TargetBranch}" bash "${SCRIPTNAME}" "$@"
-        exit 0
+        exit
     fi
 }