Update hardshrink.py

[jvishnuvardhan]

Currently the page https://www.tensorflow.org/addons/api_docs/python/tfa/activations/hardshrink?hl=de_DE is not rendered properly because of a missing backtick.

Added a backtick to format and render the page correctly

Description

Brief Description of the PR:

Fixes # (issue)

Type of change

• Bug fix
• New Tutorial
• Updated or additional documentation
• Additional Testing
• New Activation and the changes conform to the activation contribution guidelines
• New Callback and the changes conform to the callback contribution guidelines
• New Image addition and the changes conform to the image op contribution guidelines
• New Layer and the changes conform to the layer contribution guidelines
• New Loss and the changes conform to the loss contribution guidelines
• New Metric and the changes conform to the metric contribution guidelines
• New Optimizer and the changes conform to the optimizer contribution guidelines
• New RNN Cell and the changes conform to the rnn contribution guidelines
• New Seq2seq addition and the changes conform to the seq2seq contribution guidelines
• New Text addition and the changes conform to the text op contribution guidelines

Checklist:

• I've properly formatted my code according to the guidelines
  • By running Black + Flake8
  • By running pre-commit hooks
• This PR addresses an already submitted issue for TensorFlow Addons
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• This PR contains modifications to C++ custom-ops

How Has This Been Tested?

If you're adding a bugfix or new feature please describe the tests that you ran to verify your changes:
*

[bhack]

Thanks

[jvishnuvardhan]

Thanks
@bhack
I am not sure why the TF page is pointing to 0.15 version instead of master. I have updated only on master source code. Should I update it on 0.15 version also?

[bhack]

I don't know the deploy machinery for Docs. We need to ask to @lamberta

[lamberta]

Hello. I'm working on another project these days but @MarkDaoust and @markmcd can help

[MarkDaoust]

TF page is pointing to 0.15 version instead of master.

tensorflow.org documents the latest stable release. This update will get pulled into the site after the next release.

I have updated only on master source code. Should I update it on 0.15 version also?

No. We only update master. The version tags/branches should be considered frozen.

[MarkDaoust]

LGTM