Fix broken link in blog post 2017-09-05-how-to-automatically-create-a-new-mr-on-gitlab-with-gitlab-ci.html.md

Hi all,

I just read your newest guest blog post created in !6625 (merged). Loved it!

Sadly there is a teeny tiny syntax error for the link pointing the authors current employer.

I fixed that ❣

Closes: #1628 (closed)