scripts/warn-outside-container: fix font representation

Signed-off-by: Davlat Davydov <literally_user@hotmail.com>

fix CI

Author: literally-user

scripts/warn-outside-container

@@ -10,16 +10,16 @@ if [ -z "${DISABLE_WARN_OUTSIDE_CONTAINER:-}" ]; then
 				;;
 			*)
 				(
-						echo
-						echo "\033[1mWARNING\033[0m: you are not in a container."
-						echo
-						echo 'Use "\033[1mmake dev\033[0m" to start an interactive development container,'
-						echo "use \"\033[1mmake -f docker.Makefile $target\033[0m\" to execute this target"
-						echo "in a container, or set \033[1mDISABLE_WARN_OUTSIDE_CONTAINER=1\033[0m to"
-						echo "disable this warning."
-						echo
-						echo "Press \033[1mCtrl+C\033[0m now to abort, or wait for the script to continue.."
-						echo
+						printf "\n"
+						printf "\033[1mWARNING\033[0m: you are not in a container."
+						printf
+						printf 'Use "\033[1mmake dev\033[0m" to start an interactive development container,'
+						printf 'use "\033[1mmake -f docker.Makefile %s\033[0m" to execute this target' "$target"
+						printf "in a container, or set \033[1mDISABLE_WARN_OUTSIDE_CONTAINER=1\033[0m to"
+						printf "disable this warning."
+						printf
+						printf "Press \033[1mCtrl+C\033[0m now to abort, or wait for the script to continue.."
+						printf "\n"
 				) >&2
 				sleep 5
 				;;