Change wording for Modeler plugins based on bpmn-js extensions

[hkupitz]

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

I have seen multiple customers and training participants accidentally download the wrong files when wanting to install a Desktop Modeler plugin that is based on a bpmn-js extension.

Describe the solution you'd like

The link wording could be changed to something like:

Token Simulation Plugin (Camunda Modeler plugin based on bpmn-js-token-simulation)

Describe alternatives you've considered

Alternatively we could remove the link leading to the bpmn-js extensions.

[nikku]

Would #102 address your issue?

[hkupitz]

That looks good. If we want to stick to "based off", I think there's a little typo in the commit though with the "of".

[nikku]

Thanks. Merged.