Update label directory

Author: HackforLABot

github-actions/utils/_data/label-directory.json

@@ -822,5 +822,9 @@
   "NEW-frontEnd": [
     "front end",
     7702163605
+  ],
+  "NEW-roleFrontEndBackEnd": [
+    "role: front-end/back-end",
+    7702253789
   ]
 }