Ws sk edits to github blog

Why is this change being made?

@wspillane merge request to submit changes to the blog: https://about.gitlab.com/blog/2020/04/14/github-free-for-teams/

How will this merge request impact page speed?

Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what