Set single post featured image to wide align and add height to the featured image (#6502)

Co-authored-by: yashita.mittal <yashita.mittal@a8c.com>

russell/block-templates/single.html

@@ -8,7 +8,7 @@
 
 <!-- wp:group {"tagName":"main","lock":{"move":false,"remove":true}} -->
 <main class="wp-block-group">
-<!-- wp:post-featured-image {"align":"full"} /-->
+<!-- wp:post-featured-image {"align":"wide","height":"30rem"} /-->
 
 <!-- wp:post-content {"layout":{"inherit":true},"lock":{"move":false,"remove":true}} /-->