Include everything from the workshop materials when building the page

Originally triggered by an issue in the First Steps in Python course repo

added Bug Enhancement::CI/CD Enhancement::General labels

assigned to @erxleb87

Jekyll seems to drop files with a leading _ by default: https://talk.jekyllrb.com/t/jekyll-ignores-files-with-underscores/3909/3

added 1 commit

• 1366f226 - Try a more generic include

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mentioned in merge request hifis/software/education/hifis-workshops/python-first-steps!6 (closed)

mentioned in issue hifis/software/education/hifis-workshops/python-first-steps#8 (closed)

changed the description

requested review from @jandt-desy

Hello @jandt-desy, I think I fixed it.

Thanks to @frust45 for finding the cause

merged

mentioned in commit f1bc25ef