Update OBONamespace

[diatomsRcool]

Where it says

"basicPropertyValues" : [ {
  "pred" : "http://www.geneontology.org/formats/oboInOwl#hasOBONamespace",
  "val" : "plant_trait_ontology"
} ]

It would be helpful to change plant_trait_ontology to phenotypic_feature. See https://github.com/diatomsRcool/eco-kg/issues/10

This will help tag TO terms with the correct biolink semantic types for making knowledge graphs.

[diatomsRcool]

I think this will be updated in KGX