Update Changelog after 1.5.5 release (#10977)

Author: rohitgr7

CHANGELOG.md

@@ -232,40 +232,28 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 
 ### Fixed
 
-- Fixed an issue with `SignalConnector` not restoring the default signal handlers on teardown when running on SLURM or with fault-tolerant training enabled ([#10611](https://github.com/PyTorchLightning/pytorch-lightning/pull/10611))
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+-
 
-- Fixed `SignalConnector._has_already_handler` check for callable type ([#10483](https://github.com/PyTorchLightning/pytorch-lightning/pull/10483))
 
+-
 
-- Disabled batch_size extraction for torchmetric instances because they accumulate the metrics internally ([#10815](https://github.com/PyTorchLightning/pytorch-lightning/pull/10815))
 
+## [1.5.5] - 2021-12-07
 
-- Fixed importing `torch_xla.debug` for `torch-xla<1.8` ([#10836](https://github.com/PyTorchLightning/pytorch-lightning/pull/10836))
-
+### Fixed
 
+- Disabled batch_size extraction for torchmetric instances because they accumulate the metrics internally ([#10815](https://github.com/PyTorchLightning/pytorch-lightning/pull/10815))
+- Fixed an issue with `SignalConnector` not restoring the default signal handlers on teardown when running on SLURM or with fault-tolerant training enabled ([#10611](https://github.com/PyTorchLightning/pytorch-lightning/pull/10611))
+- Fixed `SignalConnector._has_already_handler` check for callable type ([#10483](https://github.com/PyTorchLightning/pytorch-lightning/pull/10483))
 - Fixed an issue to return the results for each dataloader separately instead of duplicating them for each ([#10810](https://github.com/PyTorchLightning/pytorch-lightning/pull/10810))
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 - Improved exception message if `rich` version is less than `10.2.2` ([#10839](https://github.com/PyTorchLightning/pytorch-lightning/pull/10839))
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-
 - Fixed uploading best model checkpoint in NeptuneLogger ([#10369](https://github.com/PyTorchLightning/pytorch-lightning/pull/10369))
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 - Fixed early schedule reset logic in PyTorch profiler that was causing data leak ([#10837](https://github.com/PyTorchLightning/pytorch-lightning/pull/10837))
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 - Fixed a bug that caused incorrect batch indices to be passed to the `BasePredictionWriter` hooks when using a dataloader with `num_workers > 0` ([#10870](https://github.com/PyTorchLightning/pytorch-lightning/pull/10870))
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 - Fixed an issue with item assignment on the logger on rank > 0 for those who support it ([#10917](https://github.com/PyTorchLightning/pytorch-lightning/pull/10917))
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+- Fixed importing `torch_xla.debug` for `torch-xla<1.8` ([#10836](https://github.com/PyTorchLightning/pytorch-lightning/pull/10836))
 - Fixed an issue with `DDPSpawnPlugin` and related plugins leaving a temporary checkpoint behind ([#10934](https://github.com/PyTorchLightning/pytorch-lightning/pull/10934))
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-
-- Fixed TypeError cause failure in `singal_connector` `teardown` method by adding None check ([#10961](https://github.com/PyTorchLightning/pytorch-lightning/pull/10961))
+- Fixed a `TypeError` occuring in the `SingalConnector.teardown()` method ([#10961](https://github.com/PyTorchLightning/pytorch-lightning/pull/10961))
 
 
 ## [1.5.4] - 2021-11-30