Soft landing acquisitions blog post

Closes #4799 (closed)

Review app: https://4799-soft-landing-acquisitions-2019-07-24.about-src.gitlab.com/2019/07/30/gitlab-acquisitions/

Checklist

• Link to issue added, and set to close when this MR is merged
• Due date and milestone (if applicable) added for the desired publish date
• If time sensitive
  • Added ~"priority" label
  • Mentioned @rebecca to give her a heads up ASAP
• Blog post file formatted correctly, including any accompanying images
• Review app checked for any formatting issues
• Reviewed by fellow team member
• Reviewed by content team

/label ~"blog post"