affiliations: update defaults to ror v2

[tmorrell]

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Description

This updates the default affiliations to ROR v2. Shouldn't be merged until https://github.com/inveniosoftware/invenio-vocabularies/pull/327 is.

Checklist

Ticks in all boxes and 🟢 on all GitHub actions status checks are required to merge:

• [x] I'm aware of the code of conduct.
• [x] I've created logical separate commits and followed the commit message format.
• [x] I've added relevant test cases.
• [x] I've added relevant documentation.
• [ ] I've marked translation strings.
• [ ] I've identified the copyright holder(s) and updated copyright headers for touched files (>15 lines contributions).
• [ ] I've NOT included third-party code (copy/pasted source code or new dependencies).
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