fix: 修复bullet的demo写错问题 (#1783)

Author: arcsin1

examples/bullet/basic/demo/basic.ts

@@ -15,16 +15,10 @@ const bulletPlot = new Bullet('container', {
   rangeField: 'ranges',
   targetField: 'target',
   xField: 'title',
-  style: {
-    range: {
-      color: '#5B8FF9',
-    },
-    measure: {
-      color: '#5B8FF9',
-    },
-    target: {
-      color: '#5B8FF9',
-    },
+  color: {
+    range: '#5B8FF9',
+    measure: '#5B8FF9',
+    target: '#5B8FF9',
   },
   xAxis: {
     line: null,