Rename "Discussion Channels" to "Related Links"

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The BioExcel workflows have multiple websites, documentation, tutorials, source code and live Jupyter Notebook deployments.

While it is possible to list these within the rich-text of the Description, this is cumbersome to get consistent. It is also not easy to access such links programmatically (e.g. for inclusion in RO-Crate or DataCite metadata)

The existing "Discussion Channels" almost does the job, e.g. from example https://dev.workflowhub.eu/workflows/116

Links can be added with a label, as shown above. This issue simply asks to rename "Discussion Channels" to "Related Links" of which a discussion channel would be one of possible links.

I'll make a separate issue about having drop-down selection for type of link.