chore: update yarn to 4.9.0 (#2459)

## Summary:

Update to the latest version of Yarn, which notably includes a fix from
@dannyvv 🎉

## Test Plan:

CI should pass

Author: Saadnajmi

.yarn/releases/yarn-4.5.1.cjs

@@ -1,3 +1,3 @@
 nodeLinker: node-modules
 
-yarnPath: .yarn/releases/yarn-4.5.1.cjs
+yarnPath: .yarn/releases/yarn-4.9.0.cjs

.yarn/releases/yarn-4.9.0.cjs

@@ -3,7 +3,7 @@
   "private": true,
   "version": "1000.0.0",
   "license": "MIT",
-  "packageManager": "yarn@4.5.0",
+  "packageManager": "yarn@4.9.0",
   "scripts": {
     "android": "cd packages/rn-tester && npm run android",
     "build-android": "./gradlew :packages:react-native:ReactAndroid:build",