appease linter: add dangling comma
appease linter: add dangling comma

Addresses
203:40  error    Missing trailing comma                   comma-dangle
uPortal-Project/uportal-app-framework,UW-Madison-DoIT/uw-frame,UW-Madison-DoIT/uw-frame,uPortal-Project/uportal-app-framework,uPortal-Project/uportal-app-framework,UW-Madison-DoIT/uw-frame