devices.txt: fix spelling mistake: "shapshot" -> "snapshot"

Fix spelling mistake in text.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200110100427.236530-1-colin.king@canonical.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
1 file changed