docs: improve readme description

for anyone landing on the repo

README.md

@@ -1,6 +1,6 @@
 # Benefits
 
-Transit benefits enrollment, minus the paperwork.
+Cal-ITP Benefits is an application that enables automated eligibility verification and enrollment for transit benefits onto customers’ existing contactless bank (credit/debit) cards.
 
 View the technical documentation online: <https://docs.calitp.org/benefits>