fix: Updates sample to use correct attribute for strokeWeight. (#768)

Change-Id: Id615005748b4d137e8bc05f3f044fa201411c440

Author: willum070

samples/routes-get-alternatives/index.ts

@@ -83,12 +83,15 @@ function drawRoute(route, isPrimaryRoute) {
   mapPolylines = mapPolylines.concat(
     route.createPolylines({
       polylineOptions: isPrimaryRoute
-        ? { map: innerMap }
+        ? {
+            map: innerMap,
+            strokeWeight: 5,
+          }
         : {
             map: innerMap,
             strokeColor: "#669DF6",
             strokeOpacity: 0.5,
-            strokeWidth: 8,
+            strokeWeight: 5,
           },
       colorScheme: innerMap.get("colorScheme"),
     }),