Shorten title for better url

The handbook automatically translates headings into anchor text so that sections of the handbook can be directly linked to. As such, if a title is very long, or uses strange characters, then the URL will be very long.

For example:

https://about.gitlab.com/handbook/marketing/product-marketing/messaging/#gitlab-value-proposition---how-does-gitlab-help-solve-the-customer-problems

This is too long. As a general rule, we should use as short of titles as possible and avoid putting non-alphanumeric characters into a heading.

This MR shortens the title for this page, Tagging a few folks to spread the best practice.

cc @kuthiala @johnjeremiah @cblake @dangordon @TinaS @KimLock @davistye