Fix generated filename

This is a zip file, so it should have a zip extension

.github/workflows/pull-request.yml

@@ -59,6 +59,6 @@ jobs:
         - name: Upload Artifact
           uses: actions/upload-artifact@v4
           with:
-            name: built-executable
+            name: horus-gui.zip
             path: dist/horus-gui.exe
             retention-days: 2