ci: Update GitHub Actions to Latest Version

[dciborow]

GitHub Actions Version Updates

• actions/checkout published a new release v3.5.3 on 2023-06-09T15:05:56Z
• microsoft/action-python published a new release 0.7.0 on 2023-05-17T08:36:26Z

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (main@922836d). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #126   +/-   ##
=======================================
  Coverage        ?   71.42%           
=======================================
  Files           ?        2           
  Lines           ?       14           
  Branches        ?        0           
=======================================
  Hits            ?       10           
  Misses          ?        4           
  Partials        ?        0           

Flag	Coverage Δ
unittests	71.42% <ø> (?)

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