chore(frontend): update banner for v4.1.0

browser/src/App.tsx

@@ -3,8 +3,6 @@ import { hot } from 'react-hot-loader/root'
 import { BrowserRouter as Router, Route, useLocation } from 'react-router-dom'
 import styled from 'styled-components'
 
-import { ExternalLink } from '@gnomad/ui'
-
 import Delayed from './Delayed'
 import ErrorBoundary from './ErrorBoundary'
 
@@ -72,16 +70,7 @@ const Banner = styled.div`
   }
 `
 
-const BANNER_CONTENT = (
-  <>
-    We are aware of an issue in the gnomAD v4.0 exomes where well covered variants have lower than
-    expected allele numbers. This issue will be fixed in the upcoming v4.1 release. For more
-    information, see our write-up {/* @ts-expect-error */}
-    <ExternalLink href="https://docs.google.com/document/d/1Xm5ZIhmkh7hv2qEfCDS6J2T0IUZYiXP8pNClTlNvCGQ/edit?usp=sharing">
-      here.
-    </ExternalLink>{' '}
-  </>
-)
+const BANNER_CONTENT = <>gnomAD v4 is now version v4.1.0</>
 
 const App = () => {
   const [isLoading, setIsLoading] = useState(true)