Follow-up from "Improve layout of Integrations page"

The following discussion from !16582 (merged) should be addressed:

• @eread started a discussion:

  ## Authentication

  It occurred to me that the title is probably too narrow for the broad range of topics below. For example, some provide authentication to GitLab, and one provided authentication from. So, sources might not be the best title.

  We can do in follow up, though.