rpm: adjust dependency to prevent mismatching qubes-core-admin-client

Actually, make the dependency on the python module package, which is the
important part.

rpm_spec/core-dom0.spec.in

@@ -90,6 +90,9 @@ Requires:       scrypt
 # for qubes-hcl-report
 Requires:       dmidecode
 
+# qubesd socket protocol
+Conflicts:      python3-qubesadmin < 4.1.6
+
 # Required for qvm-console* tools
 Requires:       socat