Update PUBLISHING.asciidoc

Author: Tony Robalik

PUBLISHING.asciidoc

@@ -66,7 +66,7 @@ If it failed to publish, you will instead see
     gpg: Total number processed: 0
 
 I struggled for a while to publish my key, and only succeeded after seeing
- ttps://github.com/pop-os/iso/issues/207#issuecomment-385195545[this comment] on a random Github issue tracker.
+ https://github.com/pop-os/iso/issues/207#issuecomment-385195545[this comment] on a random Github issue tracker.
 
 Like I said, magic.