Add alternative labels for the tasks module

[madbkr]

Description of the issue

As discussed in #1891 some alternative labels should be added to the new tasks-module.

Ideas of solution

label: calculate levelised cost of electricityalt: calculate LCOE label: Wind power density calculation alt: wpd calculation (and I believe this W in the label should not be a capital letter) label: run multi-criteria decision analysis alt: run MCDA

Workflow checklist

• [x ] I discussed the issue with someone else than me before working on a solution
• [x ] I already read the latest version of the workflow for this repository
• [x ] The goal of this ontology is clear to me

I am aware that

• [x ] every entry in the ontology should have a definition
• [x ] classes should arise from concepts rather than from words