Tidy up main role
Tidy up main role

Was just playing around with Lighthouse and noticed this issue.

`aria-role=""` should be `role=""`. But you don't actually need a role on main because it already has an implicit role (of main) :D
googlearchive/voice-memos,googlearchive/voice-memos,GoogleChrome/voice-memos,GoogleChrome/voice-memos,GoogleChrome/voice-memos,googlearchive/voice-memos