Updated .gitattributes for working with yaml files on Windows

[Tjalling-dejong]

Issue addressed

Fixes #

Explanation

Explain how you addressed the bug/feature request, what choices you made and why.

General Checklist

• Updated tests or added new tests
• Branch is up to date with main
• Tests & pre-commit hooks pass
• Updated documentation
• Updated changelog.rst

Data/Catalog checklist

• data/catalogs/predefined_catalogs.yml has not been modified.
• None of the old data_catalog.yml files have been chagned
• data/chagnelog.rst has been updated
• new file uses LF line endings (done automatically if you used update_versions.py)
• New file has been tested locally
• Tests have been added using the new file in the test suite

Additional Notes (optional)

Add any additional notes or information that may be helpful.

[savente93]

We could be strikter on which files we do this for, but for now this is okay. This is to make sure line endings in binary files such as PNG aren't updated and give weird changes in new PRs.