[update]更新单个示例中的symbolUrl路径

(review by ytt)

Author: SuperHuZhiPeng

examples/mapboxgl-v2/example/consumptionLevel.html

@@ -83,8 +83,7 @@
     }
 
     map.on('load', async () => {
-      window.map = map;
-      map.addSymbolLibrary(new mapboxgl.supermap.SymbolLibrary("../libs/resources/symbols"));
+      window.mapboxgl.supermap.WebSymbol.symbolUrl = "../libs/resources/symbols";
       await map.loadSymbol("point-311", (_err, symbol) => {
         map.addSymbol("point-311", symbol);
       });

examples/mapboxgl-v2/example/jingjinLanduse.html

@@ -119,12 +119,11 @@
           "line-width": 0.38,
           "line-color": "rgba(74,74,74,1.00)"
         }
-      })
-    }
+      });
+    };
 
     map.on('load', async () => {
-      window.map = map;
-      map.addSymbolLibrary(new mapboxgl.supermap.SymbolLibrary("../libs/resources/symbols"));
+      window.mapboxgl.supermap.WebSymbol.symbolUrl = "../libs/resources/symbols";
       await loadSymbols();
       createLandUseLayer();
     });