Update to v1.21.0
Release: https://github.com/research-software-directory/RSD-as-a-service/releases/tag/v1.21.0
Migration script: 1.20.0-to-1.21.0.sql
Release: https://github.com/research-software-directory/RSD-as-a-service/releases/tag/v1.21.0
Migration script: 1.20.0-to-1.21.0.sql