Fixed two typos in PacketType (didn't merge properly from thesbros)

Sorry about this!

You can probably just implement the changes on your own and close this PR.

They were changes implemented by thesbros that for some reason didn't get merged into my fork...

If you could somehow grab them from his fork, that would be good o.o

Edit:
Because I linked this PR to my master, it also now includes a tiny typo fix in the Javadocs for GameProfile