Update runtime dependency to require newer ruby-default-gems (#3968)

packaging/rpm/ondemand.spec

@@ -5,7 +5,7 @@
 %define git_tag_minus_v %(echo %{git_tag} | sed -r 's/^v//')
 %define major_version %(echo %{git_tag_minus_v} | cut -d. -f1)
 %define minor_version %(echo %{git_tag_minus_v} | cut -d. -f2)
-%define runtime_version %{major_version}.%{minor_version}.2
+%define runtime_version %{major_version}.%{minor_version}.3
 %define runtime_release 1
 %define runtime_version_full %{runtime_version}-%{runtime_release}%{?dist}
 %define selinux_policy_ver %(rpm --qf "%%{version}" -q selinux-policy)