Update concurrent and seismic shift PDFs
Closes: https://gitlab.com/gitlab-com/marketing/general/issues/3426
Includes edits from @cblake and update to boilerplate messaging via @KimLock.
Edited by Luke Babb
Closes: https://gitlab.com/gitlab-com/marketing/general/issues/3426
Includes edits from @cblake and update to boilerplate messaging via @KimLock.