use h2 in the 404

rainfall/patterns/hidden-404.php

@@ -8,16 +8,16 @@
 ?>
 <!-- wp:group {"backgroundColor":"light-orange", "align": "full", "layout": {"inherit": true}} -->
 <div class="alignfull wp-block-group has-light-orange-background-color has-background">
-    <!-- wp:group {"align": "wide"} -->
-    <div class="alignwide wp-block-group">
-        <!-- wp:heading {"level":1} -->
-        <h1><?php esc_html_e( 'Missing page', 'rainfall' ); ?></h1>
-        <!-- /wp:heading -->
-    </div>
-    <!-- /wp:group -->
-    <!-- wp:spacer {"height":"12px"} -->
-    <div style="height:12px" aria-hidden="true" class="wp-block-spacer"></div>
-    <!-- /wp:spacer -->
+	<!-- wp:group {"align": "wide"} -->
+	<div class="alignwide wp-block-group">
+		<!-- wp:heading {"level":2} -->
+		<h2><?php esc_html_e( 'Missing page', 'rainfall' ); ?></h2>
+		<!-- /wp:heading -->
+	</div>
+	<!-- /wp:group -->
+	<!-- wp:spacer {"height":"12px"} -->
+	<div style="height:12px" aria-hidden="true" class="wp-block-spacer"></div>
+	<!-- /wp:spacer -->
 </div>
 <!-- /wp:group -->