Update Territory page with links to TM document and instructions on how to request change

Why is this change being made?

The Sales Ops team is working on updating the Territory page with new maps and tables; however this MR adds a link to the SSoT Territory document that has been loaded into LeanData as an MVC as well as updated instructions on request a change to Territory Ownership. The Territory Management document is not editable by anyone outside of Sales & Mktg Ops as the accuracy of that document is critical for ongoing success of our Territory Management implementation.

/cc @james_harrison @atkach1 @jbrennan1 @ronell @mhennessy @dhong @hmason

Does this MR meet the acceptance criteria?

Conformity

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