unetbootin: 657 -> 661

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/25pjsiav4kpzyvms0a24zfmm3267nsq9-unetbootin-661/bin/unetbootin had a zero exit code or showed the expected version
- Warning: no invocation of /nix/store/25pjsiav4kpzyvms0a24zfmm3267nsq9-unetbootin-661/bin/.unetbootin-wrapped had a zero exit code or showed the expected version
- 0 of 2 passed binary check by having a zero exit code.
- 0 of 2 passed binary check by having the new version present in output.
- found 661 with grep in /nix/store/25pjsiav4kpzyvms0a24zfmm3267nsq9-unetbootin-661
- directory tree listing: https://gist.github.com/b36c6d9dbe30c7b0e794715dafed8272
- du listing: https://gist.github.com/2da554212740e7e9655de8e211d2e8ed

pkgs/tools/cd-dvd/unetbootin/default.nix

@@ -3,13 +3,13 @@
 
 stdenv.mkDerivation rec {
   name = "unetbootin-${version}";
-  version = "657";
+  version = "661";
 
   src = fetchFromGitHub {
     owner  = "unetbootin";
     repo   = "unetbootin";
     rev    = version;
-    sha256 = "18bbcrjk6ladr46kl3dvqz5pq2xcv4nnwmajqllb4sl3k1xqsngy";
+    sha256 = "0jwmmym86x9hc6yr619dxdbxdawx8x0zwld0dfrhzwxvwbqbpav5";
   };
 
   setSourceRoot = ''