Fix stripe broken link in the Values handbook page

Why is this change being made?

This MR fixes a broken link pointing to quick guide to Stripe's culture in the Gitlab's Values page

According to Internet archive wayback machine, starting from 2020, this link has redirected the traffic to https://stripe.com/jobs/culture which lists the Stripe's operating principles.

Right now, the link just returns an HTTP 404 Not found error.

One way to solve this would have been to change the target link. However, there are two issues with that:

1. The new page is titled "Operating principles" and not the old "Quick guide to Stripe's culture".
2. Among the principles, there is no longer "Global optimization", which is what this link was for, to mention where it came from.

Proposal

As the link is broken, and the actual equivalent target page doesn't mention the "Global Optimization" value. I see these options:

• A. Remove the link and the mention of that "quick guide to Stripe's culture" as well.
• B. Remove the link and mention that in the past, Stripe's culture had this value documented.
• C. Change the link to the most recent archive.org version, which shows the expected information.

In this MR, I suggest option A, since IMHO, it would cause more confusion to follow archived pages or try to understand why this value is not mentioned anymore.

Author Checklist

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