ci(release): use system zip now that it's installed on the runner

.gitea/workflows/release.yml

@@ -95,8 +95,7 @@ jobs:
           cp -r out/app    bundle/app
           cp -r out/worker bundle/worker
           ZIP_NAME="ClaudeDo-${VERSION}-win-x64.zip"
-          # python's zipfile module is used because `zip` is not installed on the host runner
-          ( cd bundle && python3 -m zipfile -c "../assets/${ZIP_NAME}" app worker )
+          ( cd bundle && zip -r -q "../assets/${ZIP_NAME}" app worker )
 
           # 2) Installer single-file exe (renamed)
           INSTALLER_EXE=$(ls out/installer/*.exe | head -n 1)