build: upgrade yarn to v4.9.4

(cherry picked from commit 2e5ad0a)

Author: csm-thu

package.json

@@ -50,5 +50,5 @@
     "rollup-plugin-postcss": "^4.0.2",
     "rollup-plugin-visualizer": "^6.0.3"
   },
-  "packageManager": "yarn@4.3.1"
+  "packageManager": "yarn@4.9.4"
 }