chore: Replace deprecated utcnow()

[winniehell]

What does this PR do?

replace datetime.datetime.utcnow() with datetime.datetime.now(datetime.timezone.utc) to resolve deprecation warnings

see warning in Python documentation: https://docs.python.org/3.8/library/datetime.html#datetime.datetime.utcnow

[winniehell]

@willingc do you have time to take a look at this tiny change? it would safe us a few deprecation warnings in our logs 🙂

[winniehell]

@MSeal do you have time to take a look at this?

[rgbkrk]

Thank you. Not sure what's up with CI not reporting back.

[winniehell]

I tried to trigger CI with another push but it doesn't seem to help 🤷

[winniehell]

https://github.com/nteract/papermill/actions/runs/19180999485 displays This workflow is awaiting approval from a maintainer in https://github.com/nteract/papermill/pull/823 for me:

[rgbkrk]

Odd that can't trigger it from here. When I get back to my laptop I'll change the repo settings to modern GitHub actions so we can kick this off and clean up the backlog of PRs.

[winniehell]

according to https://docs.github.com/en/actions/how-tos/manage-workflow-runs/approve-runs-from-forks, there should be an approve button here on the conversations tab though I'm not sure where or how it looks like

[winniehell]

I took a look at the failing tests but the error doesn't seem related to the changes here:

FAILED papermill/tests/test_adl.py::ADLTest::test_create_adapter - AttributeError: <module 'azure.datalake.store.lib' from '/home/runner/work/papermill/papermill/.tox/py39/lib/python3.9/site-packages/azure/datalake/store/lib.py'> does not have the attribute 'auth'

[winniehell]

ah, there is already an open issue for that: #825

[rgbkrk]

Alright, I think you can now rebase this PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.99%. Comparing base (cb2eb37) to head (9a723b4).
⚠️ Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #823      +/-   ##
==========================================
- Coverage   91.54%   90.99%   -0.56%     
==========================================
  Files          17       17              
  Lines        1621     1632      +11     
==========================================
+ Hits         1484     1485       +1     
- Misses        137      147      +10     

Files with missing lines	Coverage Δ
papermill/engines.py	95.81% <100.00%> (-2.57%)	⬇️
papermill/parameterize.py	97.95% <100.00%> (ø)

... and 3 files with indirect coverage changes

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[rgbkrk]

Thank you again @winniehell!