Extend guess_date_format() - pull request review

Hey,

In Hungary, we have some csv files, where the formatting of a date is ends with . (dot) → “2024.04.04.” instead of “2024.04.04”

This can be fixed by extending the list of possible date formats in the guess_date_format method located in frappe/utils/data.py.

I applied the changes in my local environment, also created a pull request last week, also created and ran a unit test for the guess_date_format method.

Is there anything else that is required on my end, to merge this change?

@ankush, can you give some feedback? This is not a doctype module rather a utility function, so not sure where else should I add any extra unit tests.