mlterm: use new tag versioning scheme

The maintainer decided to change the release tag name after the fact.

The new naming scheme is a lot more sane but I'd rather they didn't change it
after releasing with the old one.

Fixes https://github.com/NixOS/nixpkgs/issues/156856

pkgs/applications/terminal-emulators/mlterm/default.nix

@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "arakiken";
     repo = pname;
-    rev = "rel-${lib.replaceStrings [ "." ] [ "_" ] version}"; # 3.9.1 -> rel-3_9_1
+    rev = version;
     sha256 = "sha256-DvGR3rDegInpnLp3H+rXNXktCGhpjsBBPTRMwodeTro=";
   };