Club: fix typography size in pattern (#6400)

club/patterns/post-list.php

@@ -18,7 +18,7 @@
 <!-- /wp:column -->
 
 <!-- wp:column -->
-<div class="wp-block-column"><!-- wp:post-title {"level":3,"isLink":true} /--></div>
+<div class="wp-block-column"><!-- wp:post-title {"level":3,"isLink":true,"fontSize":"large"} /--></div>
 <!-- /wp:column --></div>
 <!-- /wp:columns --></div>
 <!-- /wp:column -->