PURPOSE:
- This commit slightly modifies the content of the onboarding data
articles: some paragraphs have swapped their position, typos have been
fixed, downloadable files have other names or content, advanced features
paragraph is more detailed, all with the aim of improving the user
experience.
- It also prevents data articles to reappear when upgrading the module
after that they have been deleted: if one deletes a data article, it
should behave the same way as for a regular article and this article
should be deleted forever.
Task-2852946
X-original-commit: 9e2b29fdd10e240947e350d569d9c2347dddd72e
Part-of: odoo/odoo#93834
Adrien Schoffeniels
600dbafd54