switch user-set partial charges warning to log.info

[atravitz]

Addresses #330

We decided to use logger.info, since it is encouraged for users to pre-set partial charges, and we shouldn't be yelling at them for that.

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Checklist

• Added a news entry

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• I certify that this contribution is covered by the MIT License here and the Developer Certificate of Origin at https://developercertificate.org/.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.52%. Comparing base (f8baf7f) to head (7c9e63d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #468   +/-   ##
=======================================
  Coverage   98.52%   98.52%           
=======================================
  Files          39       39           
  Lines        2166     2171    +5     
=======================================
+ Hits         2134     2139    +5     
  Misses         32       32           

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[IAlibay]

Just the one thing otherwise lgtm

[atravitz]

pre-commit.ci autofix

[dotsdl]

Just one recommended change; otherwise it is good to merge!