[8.12] [Enterprise Search] Button typo fix (#173497) (#173509)

# Backport

This will backport the following commits from `main` to `8.12`:
- [[Enterprise Search] Button typo fix
(#173497)](#173497)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Liam
Thompson","email":"[email protected]"},"sourceCommit":{"committedDate":"2023-12-18T11:27:22Z","message":"[Enterprise
Search] Button typo fix (#173497)\n\nButton uses incorrect
plural","sha":"b944280008f0d9cc72ecbe5f9ce04d492f51bd3d","branchLabelMapping":{"^v8.13.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","v8.12.0","v8.12.1","v8.13.0"],"number":173497,"url":"https://github.com/elastic/kibana/pull/173497","mergeCommit":{"message":"[Enterprise
Search] Button typo fix (#173497)\n\nButton uses incorrect
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Search] Button typo fix (#173497)\n\nButton uses incorrect
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BACKPORT-->

Co-authored-by: Liam Thompson <[email protected]>

x-pack/plugins/enterprise_search/public/applications/enterprise_search_content/components/connectors/connectors.tsx

@@ -116,7 +116,7 @@ export const Connectors: React.FC<ConnectorsProps> = ({ isCrawler }) => {
               >
                 {i18n.translate(
                   'xpack.enterpriseSearch.connectors.newConnectorsClientButtonLabel',
-                  { defaultMessage: 'New Connectors Client' }
+                  { defaultMessage: 'New Connector Client' }
                 )}
               </EuiButton>,
             ]