installation/guides/chroot: better swap mount options example

Author: r-ricci

src/installation/guides/chroot.md

@@ -255,7 +255,7 @@ tmpfs           /tmp        tmpfs   defaults,nosuid,nodev   0 0
 If using swap space, add an entry for any swap partitions:
 
 ```
-UUID=1cb4[...]  swap        swap    rw,noatime,discard      0 0
+UUID=1cb4[...]  swap        swap    defaults,discard        0 0
 ```
 
 ## Installing GRUB