Add ProxyCrawl to inspired by page.

Why is this change being made?

We got inspired in many ways by the Gitlab handbook and we saw there is this "Inspired by" page which encourages companies to be added, so we have decided to add ourselves to the page.

Does this MR meet the acceptance criteria?

According to the "inspired by page", yes.

Conformity

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