Resolve deprecation warnings of regex library

[emmanuel-ferdman]

Description

This small PR resolves the re deprecation warnings:

/home/runner/work/pytensor/pytensor/pytensor/tensor/random/rewriting/jax.py:177: DeprecationWarning: 'count' is passed as positional argument

Related Issue

• Closes #
• Related to #

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pytensor--1393.org.readthedocs.build/en/1393/

[ricardoV94]

Thanks!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.02%. Comparing base (afe934b) to head (6013d09).
⚠️ Report is 173 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1393   +/-   ##
=======================================
  Coverage   82.02%   82.02%           
=======================================
  Files         207      207           
  Lines       49294    49294           
  Branches     8746     8746           
=======================================
  Hits        40433    40433           
  Misses       6695     6695           
  Partials     2166     2166           

Files with missing lines	Coverage Δ
pytensor/tensor/random/rewriting/jax.py	97.08% <100.00%> (ø)

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