Remove the extra "as" before Hub vendors

Existing Wording:

This FHIR implementation Guide describes the exchange of patient demographic, clinical and coverage data to support fulfillment of specialty medication prescriptions by pharmacies, and enrollment of patients into related support programs offered by parties such as as Hub vendors and pharmaceutical manufacturers.

Proposed Wording:

This FHIR implementation Guide describes the exchange of patient demographic, clinical and coverage data to support fulfillment of specialty medication prescriptions by pharmacies, and enrollment of patients into related support programs offered by parties such as Hub vendors and pharmaceutical manufacturers.

(Comment 27 - imported by: Jean Duteau)