Update release_to_pypi.yml

[jGaboardi]

bump actions/setup-python from 2 to 3 in release_and_publish.yml.

See pysal/spopt#219

[codecov]

Codecov Report

Merging #344 (c10c1e5) into main (0a3d34d) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #344   +/-   ##
=======================================
  Coverage   95.90%   95.90%           
=======================================
  Files          13       13           
  Lines        2835     2835           
=======================================
  Hits         2719     2719           
  Misses        116      116           

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