Info on `mkfs.exfat` is misleading

There are (at least) 2 sources for `mkfs.exfat` program:
1. https://github.com/exfatprogs/exfatprogs
2. https://github.com/relan/exfat

The current version
```
# mkfs.exfat
# Creates an exfat filesystem inside a partition.
# More information: .

# Create an exfat filesystem inside partition 1 on device b (`sdb1`):
mkfs.exfat /dev/sdb1

# Create filesystem with a volume-name:
mkfs.exfat -n volume_name /dev/sdb1

# Create filesystem with a volume-id:
mkfs.exfat -i volume_id /dev/sdb1
```
is adapted for `relan/exfat` version.

If it was adapted for `exfatprogs/exfatprogs` version, it would differ:
```
# mkfs.exfat
# Creates an exfat filesystem inside a partition.
# More information: . (or other manpage website?)

# Create an exfat filesystem inside partition 1 on device b (`sdb1`):
mkfs.exfat /dev/sdb1

# Create filesystem with a volume-label:
mkfs.exfat -L volume_label /dev/sdb1

# Create filesystem with a volume-guid: (i think this one performs different thing compared to the other version with -i volume_id flag)
mkfs.exfat -U volume_guid /dev/sdb1
```

Start from the `mkfs.exfat` cheat sheet entry and compare its examples with the `relan/exfat` and `exfatprogs/exfatprogs` sources mentioned in the issue. Update the commands and man-page link to accurately identify the documented implementation, then verify that the options and descriptions match it.

Written by the indexing model from the issue text.