fix: typo in lr_scheduler (#1670)

fix: typo in lr_scheduler

yolox/utils/lr_scheduler.py

@@ -13,7 +13,7 @@ def __init__(self, name, lr, iters_per_epoch, total_epochs, **kwargs):
 
         Args:
             lr (float): learning rate.
-            iters_per_peoch (int): number of iterations in one epoch.
+            iters_per_epoch (int): number of iterations in one epoch.
             total_epochs (int): number of epochs in training.
             kwargs (dict):
                 - cos: None