Include `trip_stop` Event in Trip ID Requirements Documentation

[hynick4]

Is your feature request related to a problem? Please describe.

The documentation for Passenger Service and Car Share modes both define trip_stop as a valid Event Type, however the event is not listed under Trip ID Requirements as an event that requires a valid trip_id. The trip_stop event is directly related to Trip transitions, so should require a valid trip_id on the event.

Describe the solution you'd like

Add trip_stop as an event that requires a valid trip_id under Trip ID Requirements on Car Share and Passenger Services modes:

https://github.com/openmobilityfoundation/mobility-data-specification/blob/ec4f0107fad8e03b48d3d5ef1ac65e2e41a89b44/modes/car-share.md?plain=1#L63

https://github.com/openmobilityfoundation/mobility-data-specification/blob/ec4f0107fad8e03b48d3d5ef1ac65e2e41a89b44/modes/passenger-services.md?plain=1#L66

Is this a breaking change

• No, not breaking

Impacted Spec

• provider