Update src/icalendar/cal.py

Co-authored-by: Steve Piercy <web@stevepiercy.com>

src/icalendar/cal.py

@@ -763,7 +763,7 @@ def start(self, value: datetime|date) -> None:
 
     @property
     def duration(self) -> timedelta:
-        """The journal does not last any time."""
+        """The journal has no duration."""
         return timedelta(0)
 
 class FreeBusy(Component):