pony-stable: 0.2.0 -> 0.2.1

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/pony-stable/versions

pkgs/development/compilers/ponyc/pony-stable.nix

@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   name = "pony-stable-${version}";
-  version = "0.2.0";
+  version = "0.2.1";
 
   src = fetchFromGitHub {
     owner = "ponylang";
     repo = "pony-stable";
     rev = version;
-    sha256 = "0zzcq0vsl6kcrsxwqzd3s9mq7aq5sg8si5c83rxyi9n6a06gnbh7";
+    sha256 = "1wiinw35bp3zpq9kx61x2zvid7ln00jrw052ah8801s0d9dbwrdr";
   };
 
   buildInputs = [ ponyc ];