fix some minor grammar/spelling mistakes in Quests Content

- squeeking should be squeaking

"How can you expect to the fight the beast if it already has control over you?"
should be:
"How can you expect to fight the beast if it already has control over you?"

"The beast is a grand dragon of immense power and comprised of the
shadows themselves. Vice, the treacherous Shadow Wyrm."
- the second sentence has no verb, it should be a continuation of the
  first one