Fix error in ErrorBoundary

app/soapbox/components/error_boundary.js

@@ -72,7 +72,7 @@ export default class ErrorBoundary extends React.PureComponent {
           <Icon src={require('@tabler/icons/icons/mood-sad.svg')} className='sad-face' />
           <FormattedMessage id='alert.unexpected.message' defaultMessage='An unexpected error occurred.' />
           <div className='return-home'>
-            <a a href='/'>
+            <a href='/'>
               <Icon src={require('@tabler/icons/icons/arrow-back.svg')} />
               <FormattedMessage id='alert.unexpected.return_home' defaultMessage='Return Home' />
             </a>