Removed \ in french translation which leads to a syntax error and breaks

client addition page.

Author: Jonas Schwarz

interface/web/client/lib/lang/fr_client.lng

@@ -196,6 +196,6 @@ $wb['invalid_vat_id'] = 'The VAT ID is invalid.';
 $wb['email_error_empty'] = 'Email is empty';
 $wb['limit_database_user_txt'] = 'Max. Database users';
 $wb['limit_database_user_error_notint'] = 'The database user limit must be a number.';
-$wb['limit_ssl_letsencrypt_txt'] = 'Let\\'s Encrypt available';
+$wb['limit_ssl_letsencrypt_txt'] = 'Let\'s Encrypt available';
 $wb['limit_directive_snippets_txt'] = 'Show web server config selection';
 ?>