Update Yarn to v4.9.3 (jenkinsci#11008)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -68,5 +68,5 @@
   "engines": {
     "node": ">=20.0.0"
   },
-  "packageManager": "yarn@4.9.2"
+  "packageManager": "yarn@4.9.3"
 }