Minor bugfix to installer for AmigaOS

Unfortunately the installer for AmigaOS contained a little bug: it named the mission Num83r5 as Numb83r5, instead. This has been fixed and the ISO image and the AmigaOS package have been updated.

The AmigaOS users who have already installed the game, should:

1. enter the directory BOH/missions;
2. rename the file Numb83r5.bpd as Num83r5.bpd.

Besides making the mission appear with the correct name, this will allow the submission of the mission record.

All users are suggested to download the updated ISO image.