添加字体图标示例页面自动化截图对比测试

(cherry picked from commit fdafa697)

pages/pages.test.js

@@ -226,7 +226,8 @@ const pages = [
   '/pages/CSS/text/line-height',
   '/pages/CSS/text/text-align',
   '/pages/CSS/text/text-overflow',
-  '/pages/CSS/text/text-decoration-line',
+  '/pages/CSS/text/text-decoration-line',
+  '/pages/CSS/text/font-icon',
   // 单独测试例截图
   // '/pages/CSS/transition/transition',
   '/pages/CSS/pointer-events/pointer-events',