Fix misspelling of bubblegum ("bubblgum")

[jaketheda]

'Bubblegum' is currently spelled 'bubblgum', and this misspelling is causing crashes: https://www.reddit.com/r/hawkthorne/comments/95clnx/i_found_a_glitch_in_the_cheats_menu_this_message/

[niamu]

Thanks @jaketheda!