fix: pass new_cstate to tanh in multiplicativelstm

[MartinuzziFrancesco]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.12%. Comparing base (d432f8e) to head (d59f996).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #155   +/-   ##
=======================================
  Coverage   70.12%   70.12%           
=======================================
  Files          33       33           
  Lines        1590     1590           
=======================================
  Hits         1115     1115           
  Misses        475      475           

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.