Fix `.requirements` reference for extras in setup.py

AH-Merii commented 11 months ago

Reference Issues/PRs

What does this implement/fix? Explain your changes

The extras was previously referring to .requirements/dev.in, I have now updated to refer to the correct requirements found in .requirements/extras.in

What testing did you do to verify the changes in this PR?

Pull Request Checklist

[x] Added a note about the modification or contribution to the ./CHANGELOG.md file (if applicable)
[x] Added appropriate unit test functions in the ./graphein/tests/* directories (if applicable)
[x] Modify documentation in the corresponding Jupyter Notebook under ./notebooks/ (if applicable)
[x] Ran python -m py.test tests/ and make sure that all unit tests pass (for small modifications, it might be sufficient to only run the specific test file, e.g., python -m py.test tests/protein/test_graphs.py)
[x] Checked for style issues by running black . and isort .