ado_postgresql 2.3.0

We encountered an error during the generation of documentation:

raised CONSTRAINT_ERROR : GNATdoc.Entities.Entity_Information_Maps.Constant_Reference: key not in map
ERROR: Command ["gnatdoc4", "-P", ".alire/postgresql/ado_postgresql.gpr", "--output-dir", "/home/chouteau/src/github/alire/docs.ada.dev/crate/ado_postgresql/2.3.0", "--front-matter", "crate: ado_postgresql", "--no-subprojects"] exited with code 1