Add dev branch to PR tests workflow

[ashleve]

What does this PR do?

Adds dev branch to pr tests workflow.

Before submitting

• Did you make sure title is self-explanatory and the description concisely explains the PR?
• Did you make sure your PR does only one thing, instead of bundling different changes together?
• Did you list all the breaking changes introduced by this pull request?
• Did you test your PR locally with pytest command?
• Did you run pre-commit hooks with pre-commit run -a command?

Did you have fun?

Make sure you had fun coding 🙃

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (dev@2d44703). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@          Coverage Diff           @@
##             dev     #497   +/-   ##
======================================
  Coverage       ?   83.71%           
======================================
  Files          ?        9           
  Lines          ?      350           
  Branches       ?        0           
======================================
  Hits           ?      293           
  Misses         ?       57           
  Partials       ?        0           

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