Rollup merge of rust-lang#101724 - fee1-dead-contrib:triage-const-hack, r=oli-obk

Allow unauthenticated users to add the `const-hack` label

Observed in rust-lang#101401.

cc ```@oli-obk```

Author: GuillaumeGomez

triagebot.toml

@@ -11,6 +11,7 @@ allow-unauthenticated = [
     "S-*",
     "T-*",
     "WG-*",
+    "const-hack",
     "needs-fcp",
     "relnotes",
     "requires-nightly",