Merge "amis-saas-5204 [Bug] 测试：【组件优化第四批】链接-属性-基本配置-图标位置默认右侧，图标配置栏缺失；" into feat-optimize-4

packages/amis-editor/src/plugin/Link.tsx

@@ -63,6 +63,7 @@ export class LinkPlugin extends BasePlugin {
                 name: 'position',
                 pipeIn: defaultValue('rightIcon'),
                 size: 'sm',
+                value: 'rightIcon',
                 options: [
                   {
                   label: '左侧',