Bump website dependencies (#621)

Author: filiptammergard

website/package.json

@@ -7,11 +7,11 @@
     "deploy": "yarn add-pages-on-site && docusaurus deploy"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.1.0",
-    "@docusaurus/preset-classic": "^2.1.0",
-    "classnames": "^2.2.6",
-    "react": "^16.13.1",
-    "react-dom": "^16.13.1"
+    "@docusaurus/core": "^2.4.0",
+    "@docusaurus/preset-classic": "^2.4.0",
+    "classnames": "^2.3.2",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2"
   },
   "browserslist": {
     "production": [