fix: CosineAnnealingLR is missing

pl_bolts/models/self_supervised/moco/moco2_module.py

@@ -307,7 +307,11 @@ def configure_optimizers(self):
             momentum=self.hparams.momentum,
             weight_decay=self.hparams.weight_decay,
         )
-        return optimizer
+        scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(
+            optimizer,
+            self.trainer.max_epochs,
+        )
+        return [optimizer], [scheduler]
 
     @staticmethod
     def add_model_specific_args(parent_parser):