Doc/tutorial/part2.md: Format URL as link

One URL in this document did not show up as a link. Fix it.

Change-Id: I22bf2014e71e6a127a7981cc90a028e48c25da49
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82160
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

Documentation/tutorial/part2.md

@@ -30,7 +30,7 @@ often.
 
 Copy the content of `.ssh/id_ed25519.pub` (notice the ".pub" suffix
 as you need to send the public key) into the textbox "New SSH Key" at
-https://review.coreboot.org/settings/#SSHKeys and save it.
+<https://review.coreboot.org/settings/#SSHKeys> and save it.
 
 ## Step 2b: Set up an HTTP Password