Fix deprecation warnings for datetime.datetime.utcnow

[soapy1]

Context

datetime.datetime.utcnow is deprecated after python 3.10. It should be replaced with datetime.datetime.now(datetime.UTC). Once we drop python 3.10 support, we will be able to replace all instances of datetime.datetime.utcnow() with datetime.datetime.now(datetime.UTC).

Follow up to #1013

Value and/or benefit

• Fixes deprecation warnings 🔧

[imprvhub]

Hi @soapy1 can i be assigned to this? i would like to contribute!.

[soapy1]

Hey @imprvhub thanks for reaching out! I would say this is not a good one to take on. We'll want to do this when conda-store drops support for python 3.10. We're not ready to do that just yet. Thanks!

[imprvhub]

Hey @imprvhub thanks for reaching out! I would say this is not a good one to take on. We'll want to do this when conda-store drops support for python 3.10. We're not ready to do that just yet. Thanks!
@soapy1
Ok! No worries.