Make ruff happy

gso/workflows/vrf/terminate_vrf.py

 """A workflow for terminating a VRF subscription."""
+
 from typing import Any
 
 from orchestrator.forms import FormPage
@@ -30,8 +31,10 @@ def initial_input_form_generator(subscription_id: UUIDstr) -> FormGenerator:
         @model_validator(mode="before")
         def vrf_must_have_empty_router_list(cls, data: Any) -> Any:
             if vrf_subscription.vrf.vrf_router_list:
-                msg = ("VRF must not have any routers assigned to it before it can be deleted. Please remove all"
-                       " routers from the VRF first.")
+                msg = (
+                    "VRF must not have any routers assigned to it before it can be deleted. Please remove all"
+                    " routers from the VRF first."
+                )
                 raise ValueError(msg)
             return data