Fix yaw on player spawn (#6409)

patches/server/Add-PlayerSetSpawnEvent.patch

@@ -55,7 +55,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        if (event.getLocation() != null) {
 +            dimension = event.getLocation().getWorld() != null ? ((CraftWorld) event.getLocation().getWorld()).getHandle().dimension() : dimension;
 +            pos = net.minecraft.server.MCUtil.toBlockPosition(event.getLocation());
-+            angle = (float) event.getLocation().getY();
++            angle = (float) event.getLocation().getYaw();
 +            spawnPointSet = event.isForced();
 +            // Paper end