remove backquote

backup.sh

@@ -17,7 +17,7 @@ if [ -z "$MARIADB_PASS" ]; then
   exit 1
 fi
 
-mkdir -p $DIR/backups`
+mkdir -p $DIR/backups
 
 out="$DIR/backups/keycloak_$(date +%Y%m%d_%H%M).tar.gz"