Fix reference to jsonld instead of rdf

Julien LepillerWed May 27 18:35:04+0200 2020

749bb32

guile-rdf/rdf
namelast commitdate
entailment/Add rdf utils.Tue Apr 07 04:55:59+0200 2020
rdf.scmFix mapping validationSun Apr 12 23:40:51+0200 2020
utils.scmAdd rdf utils.Tue Apr 07 04:55:59+0200 2020
xsd.scmAdd xsd:doubleSun Apr 12 17:20:05+0200 2020