chore(deps): update yarn to v3.8.7

Author: renovate[bot]

package.json

@@ -11,7 +11,7 @@
     "frontend",
     "backend"
   ],
-  "packageManager": "yarn@3.6.1",
+  "packageManager": "yarn@3.8.7",
   "engines": {
     "node": ">= 20.0"
   },