build(deps): bump react-icons from 3.11.0 to 4.1.0 in /docs (#1626)

Author: dependabot[bot]

docs/package-lock.json

@@ -46,7 +46,7 @@
     "react-dom": "^16.14.0",
     "react-headroom": "^3.0.1",
     "react-helmet": "^6.1.0",
-    "react-icons": "^3.11.0",
+    "react-icons": "^4.1.0",
     "react-live": "^2.2.3",
     "url-join": "^4.0.1"
   },