fix py312 datetime.utcnow warning

[jorenham]

Chore that needs to be done:

• Add newsfragment pipenv run towncrier create [issue_number].[type].rst

Types are defined in the pyproject.toml, issue_numer either from issue tracker or the Pull request number

[jorenham]

Since there's no issue to be linked, I'm not sure what to do with the towncrier stuff.

[fizyk]

@jorenham re towncrier point to this pr

[jorenham]

@fizyk done

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (22944af) 95.26% compared to head (52c1210) 95.32%.
Report is 18 commits behind head on main.

Files	Patch %	Lines
pytest_postgresql/retry.py	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #896      +/-   ##
==========================================
+ Coverage   95.26%   95.32%   +0.06%     
==========================================
  Files          13       13              
  Lines         401      428      +27     
==========================================
+ Hits          382      408      +26     
- Misses         19       20       +1     

Flag	Coverage Δ
unittests	95.32% <0.00%> (+0.06%)	⬆️

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[fizyk]

Thank you @jorenham