docs: 📦 Update docusaurus to beta-14

Need to move gtag options from themeconfig to preset-classic configuration. Change introduce with docusaurus beta.10

https://github.com/facebook/docusaurus/pull/5832
Signed-off-by: jffarge <jf@dagger.io>

website/package.json

@@ -18,8 +18,8 @@
     "ci": "start-server-and-test 'yarn start-server' '3000|3001' 'yarn run cypress run'"
   },
   "dependencies": {
-    "@docusaurus/core": "^2.0.0-beta.9",
-    "@docusaurus/preset-classic": "^2.0.0-beta.9",
+    "@docusaurus/core": "^2.0.0-beta.14",
+    "@docusaurus/preset-classic": "^2.0.0-beta.14",
     "@mdx-js/react": "^1.6.21",
     "@svgr/webpack": "^5.5.0",
     "amplitude-js": "^8.15.0",