Custom activities documentation looks outdated

[francotiveron]

https://v3.elsaworkflows.io/docs/extensibility/custom-activities seems to report outdated information.
Please upgrade it or indicate alternative documentation.

[sfmskywalker]

I just had a quick glimpse and will go through it in more detail, but perhaps you can already point me to the bits that appear to be outdated?

[francotiveron]

Looks like most of the issue go away by changing the usings

using Elsa.Workflows.Models;
using Elsa.Workflows;
using Elsa.Extensions;