nit (elastic#173214)

## Summary

reading copy on the new search hub as part of
elastic/search-team#6428, noticed
some disagreement.

### Checklist

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

(cherry picked from commit e74f60e)

x-pack/plugins/enterprise_search/public/applications/enterprise_search_overview/components/product_selector/welcome_banner.tsx

@@ -37,7 +37,7 @@ export const WelcomeBanner: React.FC<WelcomeBannerProps> = ({ user, image }) =>
             <EuiText color="subdued">
               {i18n.translate('xpack.enterpriseSearch.welcomeBanner.header.titleDescription', {
                 defaultMessage:
-                  "There's endless ways to ingest and explore data with Elasticsearch, but here's a few of the most popular",
+                  'There are endless ways to ingest and explore data with Elasticsearch, but here are a few of the most popular',
               })}
             </EuiText>
           </EuiFlexItem>