Fix doc warning (#2627)

Summary: Resolves the following warning ``` /torchaudio/docs/source/transforms.rst:94: WARNING: Title underline too short. :hidden:`Loudness` ----------------- ``` Pull Request resolved: https://github.com/pytorch/audio/pull/2627 Reviewed By: carolineechen Differential Revision: D38814802 Pulled By: mthrok fbshipit-source-id: 5dfaf2d7bae22dba0f4a14f04ca63f28d6b2a749

Fix doc warning (#2627)
Summary: Resolves the following warning ``` /torchaudio/docs/source/transforms.rst:94: WARNING: Title underline too short. :hidden:`Loudness` ----------------- ``` Pull Request resolved: https://github.com/pytorch/audio/pull/2627 Reviewed By: carolineechen Differential Revision: D38814802 Pulled By: mthrok fbshipit-source-id: 5dfaf2d7bae22dba0f4a14f04ca63f28d6b2a749
39d24d9d · moto · Facebook GitHub Bot · 7ac3e2e2 · 39d24d9d
Commit 39d24d9d authored Aug 17, 2022 by moto Committed by Facebook GitHub Bot Aug 17, 2022
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docs/source/transforms.rst docs/source/transforms.rst +1 -1

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--- a/docs/source/transforms.rst
+++ b/docs/source/transforms.rst
@@ -91,7 +91,7 @@ Transforms are common audio transforms. They can be chained together using :clas
  .. automethod:: forward

 :hidden:`Loudness`
-----------------
+------------------

 .. autoclass:: Loudness