Fix: 针对模板卡片消息中按钮交付型消息的buttonSelection属性增加builder方法

Signed-off-by: Hodor <1221879+zhlqee@user.noreply.gitee.com>

weixin-java-cp/src/main/java/me/chanjar/weixin/cp/bean/messagebuilder/TemplateCardBuilder.java

@@ -427,6 +427,17 @@ public class TemplateCardBuilder extends BaseBuilder<TemplateCardBuilder> {
     return this;
   }
 
+  /**
+   * Button selection template card builder.
+   *
+   * @param buttonSelection the button selection
+   * @return the template card builder
+   */
+  public TemplateCardBuilder buttonSelection(TemplateCardButtonSelection buttonSelection) {
+    this.buttonSelection = buttonSelection;
+    return this;
+  }
+
   /**
    * Buttons template card builder.
    *