fix: streamline update_script function by consolidating service stop and backup logic

ct/localagi.sh

@@ -25,7 +25,7 @@ function update_script() {
   header_info
   check_container_storage
   check_container_resources
-
+  if check_for_gh_release "localagi" "mudler/LocalAGI"; then
 	msg_info "Stopping LocalAGI service"
 	$STD systemctl stop localagi
 	msg_ok "Stopped LocalAGI service"
@@ -52,6 +52,8 @@ function update_script() {
 	$STD go build -o /usr/local/bin/localagi || {
 	msg_error "Failed to build LocalAGI from source"
 	exit 1
+  fi
+	exit
   }
 
   systemctl enable -q --now localagi