Move demo section from sales directory to marketing directory in handbook
Description
we want to move https://about.gitlab.com/handbook/sales/demo/ to Product Marketing, first by moving the /demo/ section to the PMM handbook
Checklist when modifying an existing page:
-
What is the goal of changing the page? -
Would we revert the changes if we decided that it was not a success? -
Make sure events are reflected in Google Analytics/Marketo if the page is changed -
Make sure redirection is done if we change the page so email newsletters do not contain dead link