[3.0.0] Document breaking changes

[davidjb]

Orb version

3.0.0+

What happened

Updating to 3.1.1, there are number of parameter changes that break previous usage and require delving into the code (4c639c8) to determine what they are.

Expected behavior

Update the changelog or other documentation with the specifics of the breaking change - e.g. my-pipeline is now required and various parameters have changed their names (e.g. time is now max-wait-time_. Even if the changelog mentioned these changes in general linked someone off to the specific commit, then that would make updating easier.

[titanium-cranium]

+1

The user guide also needs updating, a single argument is no longer correct. Help determining how to find the pipeline number would also be appreciated.