change zip file name

Author: psadi

.github/workflows/ci.yaml

@@ -57,7 +57,7 @@ jobs:
     steps:
       - uses: actions/download-artifact@v4
         with:
-          name: ghostty-appimage
+          name: ghostty-appimage.zip
 
       - name: Upload binaries to release
         uses: svenstaro/upload-release-action@v2