Add css unit to styles.spacing.padding value to regain default paddings on menu overlay. (#8649)

Author: iamtakashi

artly/theme.json

@@ -923,7 +923,7 @@
 				"bottom": "0px",
 				"left": "var:preset|spacing|50",
 				"right": "var:preset|spacing|50",
-				"top": "0"
+				"top": "0px"
 			}
 		},
 		"typography": {
@@ -944,4 +944,4 @@
 	],
 	"version": 2,
 	"$schema": "https://schemas.wp.org/trunk/theme.json"
-}
+}