Docs: Fix some links to gitlab-foss (!25804) · Merge requests · GitLab.org / GitLab · GitLab

Stefan Schmalzhaf requested to merge the_s/gitlab:docs-fix_foss_links_2 into master Feb 24, 2020

@marcel.amirault: Again took a few minutes to check and fix some links.

Related to gitlab-docs#440 (closed)