Update links on the "E-group offsite" and "Pricing model" pages.
This updates links at https://about.gitlab.com/handbook/ceo/offsite/ and https://about.gitlab.com/handbook/ceo/pricing/.
- about.gitlab.com links are now relative to the site root.
- An obsolete fragment identifier ("Mixed-Tier-Objections---Refocus-on-the-value-and-deployment") was removed.
-
/handbook/sales-training/
=>/handbook/sales/training/