fix: allow unpausing with same receiver

Author: lherman-cs

pulsebeam/src/participant/downstream/video.rs

@@ -457,6 +457,7 @@ impl Slot {
         if let Some(current) = self.target_receiver()
             && current.rid == receiver.rid
             && current.meta.id == receiver.meta.id
+            && !self.is_paused()
         {
             return;
         }