update handy to 0.7.12 (#16)

automated update of handy appimage version and hash

## changelog
from `0.7.10` to `0.7.12`

upstream release: https://github.com/cjpais/Handy/releases/tag/v0.7.12

Co-authored-by: gitea actions <actions@localhost>
Reviewed-on: #16

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