Tanh nn wrapper

[DieracDelta]

Pull Request Template

Checklist

• Confirmed that run-checks all script has been executed.
• Made sure the book is up to date with changes in this PR.

Related Issues/PRs

Provide links to relevant issues and dependent PRs.

Changes

Add a wrapper (basically copy-pasta of relu) for the tanh activation function

Testing

Haven't included any tests.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 85.59%. Comparing base (8071b63) to head (9748281).
Report is 3 commits behind head on main.

Files	Patch %	Lines
crates/burn-core/src/nn/tanh.rs	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1903      +/-   ##
==========================================
- Coverage   86.09%   85.59%   -0.50%     
==========================================
  Files         781      786       +5     
  Lines       91688    92127     +439     
==========================================
- Hits        78935    78857      -78     
- Misses      12753    13270     +517     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[nathanielsimard]

A simple mistake to be corrected before merging, thanks