Do not trigger an emmocheck failure for ontologies with a foaf:logo annotation

[jesper-friis]

CHAMIO (and EMMO with PR 212) includes a foaf:logo annotation.
This PR makes sure that this does not trigger a missing prefLabel error.

Note that the "automatic" prefix assigned by OwlReady2 for foaf is rather awkward. It becomes "0.1" since that is the last component of the foaf IRI: http://xmlns.com/foaf/0.1/.

Description:

Type of change:

• Bug fix.
• New feature.
• Documentation update.

Checklist:

This checklist can be used as a help for the reviewer.

• Is the code easy to read and understand?
• Are comments for humans to read, not computers to disregard?
• Does a new feature has an accompanying new test (in the CI or unit testing schemes)?
• Has the documentation been updated as necessary?
• Does this close the issue?
• Is the change limited to the issue?
• Are errors handled for all outcomes?
• Does the new feature provide new restrictions on dependencies, and if so is this documented?

Comments:

[francescalb]

PRs should be made as a response to an issue, which is then closed with the PR.

[francescalb]

For some reason the action has stoppd and is not in the queue , but this should be fine to merge now.