Update Entity.json to point to geometry schema

schema/Entity.json

@@ -109,7 +109,7 @@
               "const": "GeoProperty"
             },
             "value": {
-              "$ref": "geometry-schema.json#/definitions/geometry"
+              "$ref": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/geometry-schema.json#"
             }
           },
           "required": [