Changed nav font size to use variable instead of value

blockbase/theme.json

@@ -312,7 +312,7 @@
 			},
 			"core/navigation": {
 				"typography": {
-					"fontSize": "18px"
+					"fontSize": "var(--wp--preset--font-size--normal)"
 				}
 			},
 			"core/navigation-link": {