chore: upgrade docusaurus 2.3.1 (#1336)

* chore: upgrade docusaurus
* chore: upgrade website react

Author: mdjastrzebski

website/package.json

@@ -10,11 +10,11 @@
   },
   "dependencies": {
     "@babel/core": "^7.11.1",
-    "@docusaurus/core": "^2.0.1",
-    "@docusaurus/preset-classic": "^2.0.1",
+    "@docusaurus/core": "^2.3.1",
+    "@docusaurus/preset-classic": "^2.3.1",
     "classnames": "^2.2.6",
-    "react": "^16.8.4",
-    "react-dom": "^16.8.4"
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2"
   },
   "browserslist": {
     "production": [