Update CHANGELOG.md

Author: awaelchli

CHANGELOG.md

@@ -7,7 +7,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ## [1.4.6] - unreleased
 
-- Fixed signature of `Timer.on_train_epoch_end` and `StochasticWeightAveraging.on_train_epoch_end` to prevent unwanted depreation warnings ([#9347](https://github.com/PyTorchLightning/pytorch-lightning/pull/9347))
+- Fixed signature of `Timer.on_train_epoch_end` and `StochasticWeightAveraging.on_train_epoch_end` to prevent unwanted deprecation warnings ([#9347](https://github.com/PyTorchLightning/pytorch-lightning/pull/9347))
 
 
 ## [1.4.5] - 2021-08-31