L2SS-572: fix typo

tangostationcontrol/tangostationcontrol/devices/tilebeam.py

@@ -85,7 +85,7 @@ class TileBeam(beam_device):
             d.set_measure_time(timestamp)
 
             # calculate the delays based on the set reference position, the set time and now the set direction and antenna positions
-            delays[tile] = d.convert(pointing_direction[tile], self.HBAT_antenna_positions[tile])
+            delays[tile] = d.delays(pointing_direction[tile], self.HBAT_antenna_positions[tile])
 
         return delays