bump PaymentServer to version exposing more info

nixos/pkgs/zkapissuer/repo.json

 {
   "owner": "PrivateStorageio",
   "repo": "PaymentServer",
-  "rev": "d82908141edcd2ddce40bc50b8b2a4f1959f1b30",
+  "rev": "dcb400968bee2d42b293531317d42d31593d4224",
   "branch": "main",
   "outputHashAlgo": "sha512",
-  "outputHash": "0r84hjrd03znizr915nn886rybxn9pq4h8fsf6vx8jkh05whr2b950rk4ld3mi9gq75cksd688pi1aqyy9in3ybll2b1m98j9f0h7mz"
+  "outputHash": "14iwy71izijdgws9lvqb0jzhpa2imq47h0mb8s4sdk15anh5dci3m5zxxad8bpc5gxmai71pz297880nph2f52i538gjxs6n1m6vrl7"
 }
\ No newline at end of file