Improve invalid escape character on neuropixel tools

[h-mayorquin]

There are some invalid escape sequences that were in the docstrings.

[EDIT] I thought that this was throwing an error but is was just a warning. So I guess this can be just a documentation improvement : )

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.92%. Comparing base (9279d1f) to head (1409e1e).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #369   +/-   ##
=======================================
  Coverage   89.92%   89.92%           
=======================================
  Files          12       12           
  Lines        2044     2044           
=======================================
  Hits         1838     1838           
  Misses        206      206           

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[chrishalcrow]

Thanks!