ott: 0.27 -> 0.28

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/ott/versions.

These checks were done:

- built on NixOS
- ran ‘/nix/store/2lbl8zpp2lrrh9pgh2gnyhimq6i86rl1-ott-0.28/bin/ott --help’ got 0 exit code
- ran ‘/nix/store/2lbl8zpp2lrrh9pgh2gnyhimq6i86rl1-ott-0.28/bin/ott.opt --help’ got 0 exit code
- found 0.28 with grep in /nix/store/2lbl8zpp2lrrh9pgh2gnyhimq6i86rl1-ott-0.28
- directory tree listing: https://gist.github.com/177f63b8c23bae6301ced29fb0e617c4

pkgs/applications/science/logic/ott/default.nix

@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   name = "ott-${version}";
-  version = "0.27";
+  version = "0.28";
 
   src = fetchFromGitHub {
     owner = "ott-lang";
     repo = "ott";
     rev = version;
-    sha256 = "12hzpyinswqaxwp6y793h7ywrv6289cw4911ah2yzq04ji095pfb";
+    sha256 = "0mzbrvqayqpns9zzg4m1scxx24dv9askhn51dawyb9pisvlyvai0";
   };
 
   nativeBuildInputs = [ pkgconfig ];