Archeo: add CSS for mobile menu font size (#5644)

* Add CSS for mobile menu font size

* Remove CSS patch

* Move navigation font size into theme.json

archeo/parts/header.html

@@ -2,7 +2,7 @@
 <div class="wp-block-group"><!-- wp:group {"align":"full","style":{"spacing":{"padding":{"bottom":"var(--wp--custom--spacing--outer)","top":"var(--wp--custom--spacing--outer)"}}},"layout":{"type":"flex","justifyContent":"space-between"}} -->
 <div class="wp-block-group alignfull" style="padding-top:var(--wp--custom--spacing--outer);padding-bottom:var(--wp--custom--spacing--outer)"><!-- wp:site-title /-->
 
-<!-- wp:navigation {"overlayBackgroundColor":"foreground","overlayTextColor":"background","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"left"},"style":{"typography":{"fontStyle":"normal"},"spacing":{"blockGap":"50px"}},"fontSize":"small"} -->
+<!-- wp:navigation {"overlayBackgroundColor":"foreground","overlayTextColor":"background","layout":{"type":"flex","setCascadingProperties":true,"justifyContent":"left"},"style":{"typography":{"fontStyle":"normal"},"spacing":{"blockGap":"50px"}}} -->
 <!-- wp:page-list /-->
 <!-- /wp:navigation --></div>
 <!-- /wp:group --></div>

archeo/theme.json

@@ -118,6 +118,11 @@
 					"lineHeight": "1.1"
 				}
 			},
+			"core/navigation": {
+				"typography": {
+					"fontSize": "var(--wp--preset--font-size--small)"
+				}
+			},
 			"core/post-comments": {
 				"elements": {
 					"h3": {