update vlass templates for pimscache python3.10 upgrade

Let's make sure pimscache can actually find python3.10 from a workflow...

shared/workspaces/workspaces/capability/schema.py

@@ -1364,7 +1364,7 @@ class CapabilityRequest(JSONSerializable):
         return CapabilityRequest(**copy)
 
     @property
-    def current_version(self) -> CapabilityVersion:
+    def current_version(self) -> CapabilityVersion | None:
         return self.versions[-1] if len(self.versions) else None