update zen browser to 1.19.3b (#14)

automated update of zen browser appimage version and hash

## changelog
from `1.19.2b` to `1.19.3b`

upstream release: https://github.com/zen-browser/desktop/releases/tag/1.19.3b

Co-authored-by: gitea actions <actions@localhost>
Reviewed-on: #14

modules/pkgs/handy.nix

@@ -2,11 +2,11 @@
   perSystem = {pkgs, ...}: {
     packages.handy = pkgs.appimageTools.wrapType2 rec {
       pname = "handy";
-      version = "0.7.10";
+      version = "0.7.12";
 
       src = pkgs.fetchurl {
         url = "https://github.com/cjpais/Handy/releases/download/v${version}/Handy_${version}_amd64.AppImage";
-        hash = "sha256-vBOcXCCJr9D0u0h27nN4XLPPngx4m+toAfi6O6Fuojk=";
+        hash = "sha256-Qh82PvZErWWhARs7ZzoGFllQXKsF63GUGqG5taT+kV8=";
       };
 
       extraInstallCommands = let