*Update: The Sixers have downgraded Joel Embiid’s playing status for Monday night’s game against the Miami Heat to out. Monday’s game marks the first time Embiid will miss a matchup since January 30.  The Philadelphia 76ers are set to play in back-to-back games for the second week in a row. Last Sunday, the Sixers wrapped up an overtime win on the road against the Orlando Magic before heading home and hosting the Denver Nuggets. Joel Embiid, who used to take off games in the past when it came to back-to-backs, made it clear that sitting out last Monday’s game wasn’t an option. Embiid played as expected, but the big man…