Grammar fixes

Open username-removed-718005 requested to merge m1guelpiedrafita/gitlab-ee:patch-3 into master

See the general Documentation guidelines

What does this MR do?

Fixes some words

Moving docs to a new location?

See the guidelines:

  • Make sure the old link is not removed and has its contents replaced with a link to the new location.
  • Make sure internal links pointing to the document in question are not broken.
  • Search and replace any links referring to old docs in GitLab Rails app, specifically under the app/views/ directory.
  • If working on CE, submit an MR to EE with the changes as well.