Adjust post-title in theme.json

rainfall/theme.json

@@ -137,6 +137,15 @@
 						}
 					}
 				}
+			},
+			"core/post-title": {
+				"elements": {
+					"link": {
+						"typography": {
+							"textDecoration": "none"
+						}
+					}
+				}
 			}
 		},
 		"color": {