Update description in afpo.md (#2600)

Author: Anita Caron

ontology/afpo.md

@@ -7,7 +7,7 @@ contact:
   github: Melek-C
   label: Melek Chaouch
   orcid: 0000-0001-5868-4204
-description: AfPO is a tool which enables to annotate the African individuals, and brings together knowledge accumulated about existing populations with their genetic fingerprint in a standardized format.
+description: AfPO is an ontology that can be used in the study of diverse populations across Africa. It brings together publicly available demographic, anthropological and genetic data relating to African people in a standardised and structured format. The AfPO can be employed to classify African study participants comprehensively in prospective research studies. It can also be used to classify past study participants by mapping them using a language or ethnicity identifier or synonyms.
 domain: organisms
 homepage: https://github.com/h3abionet/afpo
 license: