Small change to conform capability queue interface to implementation

shared/workspaces/src/workspaces/capability_interfaces.py

@@ -136,7 +136,7 @@ class CapabilityQueueIF(ABC):
     """
 
     @abstractmethod
-    def enqueue(self, request: CapabilityRequestIF, priority: int):
+    def enqueue(self, execution: CapabilityExecutionIF, priority: int):
         raise NotImplementedError(f"{self.__class__.__name__}.{inspect.stack()[0][3]}")
 
     @abstractmethod