Set pandas_io.from_frictionless_schema to use a raw string for docs

[mark-thm]

In Python 3.12 I receive the following SyntaxWarning just by importing pandas_io:

.../site-packages/pandera/io/pandas_io.py:743: SyntaxWarning: invalid escape sequence '\S'
  """Create a :class:`~pandera.api.pandas.container.DataFrameSchema` from either a

By setting the docs to a raw string, these otherwise invalid escape sequences are permitted.

[mark-thm]

The CI failure seems unrelated to this change, it’s not clear to me what steps I might take to debug. Any pointers?

[cosmicBboy]

Can you rebase onto main branch?

[mark-thm]

Rebased to main.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.12%. Comparing base (4df61da) to head (090db11).
Report is 71 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1597       +/-   ##
===========================================
- Coverage   94.29%   83.12%   -11.17%     
===========================================
  Files          91      114       +23     
  Lines        7024     8490     +1466     
===========================================
+ Hits         6623     7057      +434     
- Misses        401     1433     +1032     

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[cosmicBboy]

thanks @mark-thm, and congrats on your first contribution to pandera! 🚀

[mark-thm]

@cosmicBboy any sense of when the next release (containing this PR) is due to come out?