update test topology with SR OS image

roles/containerlab/templates/test_topology.clab.yml

@@ -4,6 +4,10 @@ topology:
   kinds:
     vr-vmx:
       image: '{{ docker.registry_url }}/vrnetlab/vr-vmx:18.2R1.9'
+    vr-sros:
+      image: '{{ docker.registry_url }}/vrnetlab/vrnetlab/vr-sros:23.3.R3'
   nodes:
     vmx1:
       kind: vr-vmx
+    vmx2:
+      kind: vr-sros