Allow after_build_id to be empty

Stop quoting after_build_id in order to use it even when it's empty.
Disable shellcheck error reporting on this.

.github/workflows/fedora-copr-build.yml

@@ -194,10 +194,11 @@ jobs:
               if ! is_package_supported_by_chroot "${pkg}" "${chroot}"; then
                 echo "Package '${pkg}' is not supported by chroot: ${chroot}";
               else
+                # shellcheck disable=SC2086
                 copr build-package \
                   --timeout $((30*3600)) \
                   --nowait \
-                  --name "$pkg" "${after_build_id}" \
+                  --name "$pkg" ${after_build_id} \
                   --chroot "${chroot}" \
                   ${{ env.project_today }} \
                   | tee "${pkg}.log"