Update textAlign attribute

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

@@ -8,7 +8,7 @@
 
 <!-- wp:site-title {"align":"center"} /-->
 
-<!-- wp:site-tagline {"align":"center","fontSize":"small"} /-->
+<!-- wp:site-tagline {"textAlign":"center","fontSize":"small"} /-->
 
 <!-- wp:navigation {"itemsJustification":"center"} -->
 <!-- wp:navigation-link {"label":"Home","url":"#"} /-->