Update exercises/dnd-character/introduction.md

Co-authored-by: Isaac Good <IsaacG@users.noreply.github.com>

Author: ErikSchierboom

exercises/dnd-character/introduction.md

@@ -3,7 +3,7 @@
 After weeks of anticipation, you and your friends get together for your very first game of [Dungeons & Dragons][dnd] (D&D).
 Since this is the first session of the game, each player has to generate a character to play with.
 The character's abilities are determined by rolling 6-sided dice, but where _are_ the dice?
-With a shock, you realize that your friends are waiting for _you_ to produce the dice, after all it was your idea to play D&D!
+With a shock, you realize that your friends are waiting for _you_ to produce the dice; after all it was your idea to play D&D!
 Panicking, you realize you forgot to bring the dice, which would mean no D&D game.
 As you have some basic coding skills, you quickly come up with a solution: you'll write a program to simulate dice rolls.