Update torch/optim/lr_scheduler.py

Co-authored-by: Jane (Yuan) Xu <31798555+janeyx99@users.noreply.github.com>

Author: alperenunlu

torch/optim/lr_scheduler.py

@@ -812,7 +812,7 @@ def _get_closed_form_lr(self):
 class CosineAnnealingLR(LRScheduler):
     r"""Set the learning rate of each parameter group using a cosine annealing schedule.
 
-    Where :math:`\eta_{max}` is set to the initial lr and
+    :math:`\eta_{max}` is set to the initial lr and
     :math:`T_{cur}` is the number of epochs since the last restart in SGDR:
 
     .. math::