Bump antd from 3.26.11 to 3.26.12 in /web

Bumps [antd](https://github.com/ant-design/ant-design) from 3.26.11 to 3.26.12.
- [Release notes](https://github.com/ant-design/ant-design/releases)
- [Changelog](https://github.com/ant-design/ant-design/blob/3.26.12/CHANGELOG.en-US.md)
- [Commits](https://github.com/ant-design/ant-design/compare/3.26.11...3.26.12)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

web/package.json

@@ -11,7 +11,7 @@
     "@types/react": "^16.9.22",
     "@types/react-dom": "^16.9.5",
     "@types/react-router-dom": "^5.1.3",
-    "antd": "^3.26.11",
+    "antd": "^3.26.12",
     "babel-plugin-import": "^1.13.0",
     "customize-cra": "^0.9.1",
     "react": "^16.12.0",