Enable ruff DTZ005 rule (#11327)

* Enable ruff DTZ005 rule

* Fix other/gauss_easter.py

* Fix

* Fix web_programming/instagram_pic.py

* Fix web_programming/instagram_video.py

* Apply suggestions from code review

* Update instagram_pic.py

* datetime.now(tz=UTC).astimezone()

* .astimezone()

* Fix

---------

Co-authored-by: Christian Clauss <cclauss@me.com>