Update geometry-schema.json

schema/geometry-schema.json

 {
     "$schema": "http://json-schema.org/draft-04/schema#",
-    "id": "http://json-schema.org/geojson/geometry.json#",
+    "id": "https://forge.etsi.org/gitlab/NGSI-LD/NGSI-LD/raw/master/schema/geometry-schema.json",
     "title": "geometry",
     "description": "One geometry as defined by GeoJSON. Licensed as per original source is https://github.com/fge/sample-json-schemas/blob/master/geojson/geometry.json",
     "type": "object",