Fix a typo in the adjusted minesweeper sample

Found that the pop up that came up after losing a game said, "Bang! You loose."
Wanted my first commit to the shoes4 project so here is the typo fix to make
the pop up state that, "Bang! You lose."
Merge pull request #947 from neilnorthrop/sample/minesweeper

Fix a typo in the adjusted minesweeper sample

Changelog: bugfix