The Washington Wizards and center/forward Kristaps Porziņģis are in active talks about a contract extension, league sources tell The Athletic. Here’s what you need to know: Porziņģis and the Wizards have been seriously discussing a new deal in which he would opt out of his $36 million player option for the 2023-24 season and sign a new long-term deal, according to sources. The Wizards can offer Porziņģis a maximum of four years and $180 million if he opts out for next year and extends his deal. The deadline to reach such an agreement is in late June. The Wizards, who…