Moving from Elasticsearch to OpenSearch

[psaiz]

:heart: Thank you for your contribution!

Description

This closes https://github.com/inveniosoftware/docs-invenio-rdm/issues/432 It renames Elasticsearch to OpenSearch and changes the link to the documentation.

Checklist

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• [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.
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[psaiz]

Thanks @fenekku ! Moving it to approved then