Migrate to Ruby 3

[syphax-bouazzouni]

Related work done by NCBO

• https://github.com/ncbo/ontologies_linked_data/pull/214
• https://github.com/ncbo/ontologies_api/pull/159
• https://github.com/ncbo/ncbo_annotator/pull/34
• https://github.com/ncbo/ncbo_ontology_recommender/pull/22
• https://github.com/ncbo/ncbo_cron/pull/84
• https://github.com/ncbo/bioportal_web_ui/pull/284

[syphax-bouazzouni]

Related https://github.com/ontoportal-lirmm/ontologies_api/pull/102