The Vegas Golden Knights have agreed to terms on a four-year, $13 million contract extension with defenseman Kaedan Korczak, the club announced Wednesday. The deal carries an average annual value of $3.25 million. Korczak is currently in the second year of a two-year contract with an AAV of $825,000. The 24-year-old right-shot defenseman recorded 10 assists and a plus-15 rating in 40…