chore(deps): update yarn to v4.9.0 (#1146)

Author: renovate[bot]

website/package.json

@@ -60,5 +60,5 @@
         "stream-browserify": "^3.0.0",
         "unist-util-visit": "^5.0.0"
     },
-    "packageManager": "yarn@4.8.1"
+    "packageManager": "yarn@4.9.0"
 }