Pin antd to version 3.26.12

package.json

@@ -61,7 +61,7 @@
   "dependencies": {
     "@ant-design/pro-layout": "^4.10.13",
     "@antv/data-set": "^0.11.0",
-    "antd": "^3.23.6",
+    "antd": "3.26.12",
     "classnames": "^2.2.6",
     "dva": "^2.6.0-beta.16",
     "lodash": "^4.17.11",