fix(start): fix typo in filename

Author: nijel

start

@@ -214,7 +214,7 @@ if [ "$1" = "runserver" ] ; then
 
         if [ "${CELERY_SINGLE_PROCESS:-0}" -eq 1 ] ; then
             # Symlink single process service only
-            ln -s /etc/supervisor/conf.d/celery-signle.conf  "$SUPERVISOR_CONF"
+            ln -s /etc/supervisor/conf.d/celery-single.conf  "$SUPERVISOR_CONF"
         else
             # Symlink all celery services but the single process
             find /etc/supervisor/conf.d -type f -name 'celery-*.conf' ! -name 'celery-single.conf' -print0 | xargs -0 -I '{}' ln -s '{}' "$SUPERVISOR_CONF"