[infer][PR] Update website dependencies

Summary: Pull Request resolved: https://github.com/facebook/infer/pull/1288

Reviewed By: da319

Differential Revision: D22475967

Pulled By: jvillard

fbshipit-source-id: 036963540

website/package.json

@@ -10,12 +10,12 @@
     "deploy": "docusaurus deploy"
   },
   "dependencies": {
-    "@docusaurus/core": "2.0.0-alpha.54",
-    "@docusaurus/preset-classic": "2.0.0-alpha.54",
+    "@docusaurus/core": "2.0.0-alpha.58",
+    "@docusaurus/preset-classic": "2.0.0-alpha.58",
     "classnames": "2.2.6",
     "react": "16.13.1",
     "react-dom": "16.13.1",
-    "react-github-btn": "1.1.1"
+    "react-github-btn": "1.2.0"
   },
   "devDependencies": {
     "prettier": "2.0.5"