Update version in flake.nix

flake.nix

@@ -21,7 +21,7 @@
         packages = rec {
           wee = pkgs.stdenv.mkDerivation rec {
             pname = "wee";
-            version = "0.0.1-SNAPSHOT";
+            version = "0.0.1";
             name = "${pname}-${version}";
             src = pkgs.nix-gitignore.gitignoreSource [ "*.nix" ] ./.;
             nativeBuildInputs = [