ci: Try a workaround for packit propose-downstream (#1067)

Can be reverted after packit/packit#2573

Closes #1065

Signed-off-by: Cristian Le <git@lecris.dev>

Author: LecrisUT

.packit.yaml

@@ -7,6 +7,9 @@ files_to_sync:
       - "protect sources"
       - "protect changelog"
       - "protect gating.yaml"
+      # Temporary workaround until
+      # https://github.com/packit/packit/pull/2573
+      - "- python-scikit-build-core.spec"
   - .packit.yaml
 
 upstream_package_name: scikit-build-core