docs(ui5): Fix icon binding contradiction in Configuration Editor example

The manifest defines header.icon.src as {parameters>/icon/value}, so the
editor should bind to the parameter path instead of the header path.
Otherwise the editor writes to a different manifest location than the
binding reads from.

Author: dimovpetar

plugins/ui5/skills/integration-cards/references/configuration_editor_example.md

@@ -109,7 +109,7 @@ sap.ui.define(["sap/ui/integration/Designtime"], function (Designtime) {
 					},
 
 					icon: {
-						manifestpath: "/sap.card/header/icon/src",
+						manifestpath: "/sap.card/configuration/parameters/icon/value",
 						type: "string",
 						label: "Icon",
 						visualization: {