content/wip/update-to-letters-page (#7571)
content/wip/update-to-letters-page (#7571)

* per SME request updated letters page

* formatting fix: letters

* edit to subhead/question: Letters

* Update index.md

* hyperlink phone number

* updated sentence about letters the user will see

* tweak: letters listed above

department-of-veterans-affairs/vets-website,department-of-veterans-affairs/vets-website