doc: adapted tests according to latest meeting and fixed linting warnings
Adapted test suite according to the meeting decisions.
Also fixed some linting warnings on the document and some markdown heading styles.
We inform you that on W09 23-27/2, we will proceed with an upgrade of GitLab to v18. The maintenance window will last 4 hours, with possible downtime during this period. The exact time of the upgrade will be announced in a follow-up notice.
Adapted test suite according to the meeting decisions.
Also fixed some linting warnings on the document and some markdown heading styles.