fix: choose language link for local dev (#9215)

@superset-ui/connection will add protocol and host to an "endpoint" call.

`e.currentTarget.href` may return the full URL instead of the relative
url.

superset-frontend/src/setup/setupApp.ts

@@ -67,7 +67,7 @@ export default function setupApp() {
     ) {
       ev.preventDefault();
       SupersetClient.get({
-        endpoint: ev.currentTarget.href,
+        url: ev.currentTarget.href,
         parseMethod: null,
       }).then(() => {
         location.reload();