Bump date-fns from 2.21.0 to 2.21.1 (#129)

Bumps [date-fns](https://github.com/date-fns/date-fns) from 2.21.0 to 2.21.1.
- [Release notes](https://github.com/date-fns/date-fns/releases)
- [Changelog](https://github.com/date-fns/date-fns/blob/master/CHANGELOG.md)
- [Commits](https://github.com/date-fns/date-fns/compare/v2.21.0...v2.21.1)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

web/package.json

@@ -13,7 +13,7 @@
     "antd": "^4.15.1",
     "chart.js": "^3.1.0",
     "classnames": "^2.3.1",
-    "date-fns": "^2.21.0",
+    "date-fns": "^2.21.1",
     "markdown-it": "^12.0.4",
     "next": "^10.1.3",
     "prop-types": "^15.7.2",