formatting of bullet points

[f-hafner]

perhaps a detail, and could be problem with the workbench: the bullet points do not format nicely on the website (they seem fine in markdown on github)

examples:

1. https://github.com/esciencecenter-digital-skills/parallel-python-workbench/blob/main/episodes/introduction.md#its-not-all-good-news vs https://esciencecenter-digital-skills.github.io/parallel-python-workbench/introduction.html#callout3
2. website:

   Most problems will fit in one of two categories: - I wrote this code in Python and it is not fast enough. - I run this code on my laptop, but the target problem size is bigger than the RAM.

markdown:

Most problems will fit in one of two categories:

• I wrote this code in Python and it is not fast enough.
• I run this code on my laptop, but the target problem size is bigger than the RAM.