Bump to a ZKAPAuthorizer without python-cryptography and python-autobahn

overrides

They're not necessary on newly selected nixpkgs revision.

nixos/pkgs/zkapauthorizer-repo.nix

@@ -2,8 +2,8 @@ let
   pkgs = import <nixpkgs> {};
 in
   pkgs.fetchFromGitHub {
-    owner = "privatestorageio";
-    repo = "zkapauthorizer";
-    rev = "0ae5bb532b9dfd515c65852bdbe86bd85d70f0e8";
-    sha256 = "06vsy7lbn4j9rwgzb5qcjj6255x27q1a2z84xphr0675rdi27f4f";
+    owner = "PrivateStorageio";
+    repo = "ZKAPAuthorizer";
+    rev = "996f0acdb46dc0f2ef14a06ae0012771b43c087c";
+    sha256 = "09kkzq6pd61xwaq6dlfl25rqbi7ssdzkvknhsx59cyanxpk66rcd";
   }
\ No newline at end of file