Fixed --hostname argument typo in documentation

[iskandergaba]

There is a typo in the usr/share/man/man1/byobu-select-profile.1 and usr/bin/byobu-select-profile.in where the documentation mentions the argument --hostnmae instead of --hostname. The typo can be seen when executing the command byobu-select-profile without any arguments.

I fixed that, swapping a couple of letters a couple of times as you can see :)