Update README.metadata.json

Add missing redirect from link for https://developers.arcgis.com/swift/sample-code/sketch-on-map/

Author: yo1995

Shared/Samples/Create and edit geometries/README.metadata.json

@@ -20,7 +20,9 @@
         "GraphicsOverlay",
         "MapView"
     ],
-    "redirect_from": [],
+    "redirect_from": [
+        "/swift/sample-code/sketch-on-map/"
+    ],
     "relevant_apis": [
         "Geometry",
         "GeometryBuilder",