TensorBoard Lesson -> Lesson Number (#4347)

ml-agents/mlagents/trainers/stats.py

 
 class GaugeWriter(StatsWriter):
     """
-    Write all stats that we recieve to the timer gauges, so we can track them offline easily
+    Write all stats that we receive to the timer gauges, so we can track them offline easily
     """
 
     @staticmethod

ml-agents/mlagents/trainers/trainer_controller.py

         ) in self.param_manager.get_current_lesson_number().items():
             for trainer in self.trainers.values():
                 trainer.stats_reporter.set_stat(
-                    f"Environment/Lesson/{param_name}", lesson_number
+                    f"Environment/Lesson Number/{param_name}", lesson_number
                 )
 
         for trainer in self.trainers.values():