Replace header image with site logo block.

seedlet-blocks/block-template-parts/header.html

@@ -1,6 +1,4 @@
-<!-- wp:image {"align":"center","width":128,"height":128,"sizeSlug":"large","className":""} -->
-<div class="wp-block-image"><figure class="aligncenter size-large is-resized"><img src="https://cldup.com/B9dfntUFJE.png" alt="" width="128" height="128"/></figure></div>
-<!-- /wp:image -->
+<!-- wp:site-logo {"align":"center","width":128} /-->
 
 <!-- wp:site-title {"align":"center"} /-->