fix: properly clone ConditionalTask instances

Previously copying a Task always returned an instance of Task even when we are cloning a subclass, such ConditionalTask.
This commit ensures that the clone preserve the original class type

src/crewai/task.py

@@ -572,7 +572,15 @@ class Task(BaseModel):
     def copy(
         self, agents: List["BaseAgent"], task_mapping: Dict[str, "Task"]
     ) -> "Task":
-        """Create a deep copy of the Task."""
+        """Creates a deep copy of the Task while preserving its original class type.
+
+        Args:
+            agents: List of agents available for the task.
+            task_mapping: Dictionary mapping task IDs to Task instances.
+
+        Returns:
+            A copy of the task with the same class type as the original.
+        """
         exclude = {
             "id",
             "agent",
@@ -595,7 +603,7 @@ class Task(BaseModel):
         cloned_agent = get_agent_by_role(self.agent.role) if self.agent else None
         cloned_tools = copy(self.tools) if self.tools else []
 
-        copied_task = Task(
+        copied_task = self.__class__(
             **copied_data,
             context=cloned_context,
             agent=cloned_agent,