fixed font size

quadrat/child-experimental-theme.json

@@ -279,7 +279,7 @@
 			}
 		},
 		"typography": {
-			"fontSize": "20px",
+			"fontSize": "18px",
 			"fontWeight": "300",
 			"lineHeight": "var(--wp--custom--line-height--body)"
 		}

quadrat/experimental-theme.json

@@ -514,7 +514,7 @@
 		"typography": {
 			"lineHeight": "var(--wp--custom--line-height--body)",
 			"fontFamily": "var(--wp--preset--font-family--base)",
-			"fontSize": "20px",
+			"fontSize": "18px",
 			"fontWeight": "300"
 		}
 	}