adding aria-live to resolve JAWS issue (#22785)

Co-authored-by: Babinder Rathi babinderrathi@gmail.com

webapp/channels/src/components/invitation_modal/invite_view.tsx

@@ -102,6 +102,7 @@ export default function InviteView(props: Props) {
                 }, {inviteURL})
             }
             className='InviteView__copyLink'
+            aria-live='polite'
         >
             {!copyText.copiedRecently && (
                 <>