Wrong unit measure displayed in 03_mapping_iss_exercise_scale_altitude

The altitude and velocity are in kilometers when returned with the Latitude and Longitude for the ISS position.

`{
"name": "iss",
"id": 25544,
"latitude": -48.454232517203,
"longitude": 139.35666682131,
"altitude": 438.82147463579,
"velocity": 27526.889664381,
"visibility": "daylight",
"footprint": 4602.0052932888,
"timestamp": 1678852751,
"daynum": 2460018.6660995,
"solar_lat": -2.259260610592,
"solar_lon": 122.47565276751,
"units": "kilometers"
}`

Open the 03_mapping_iss_exercise_scale_altitude exercise and trace where the ISS position response is mapped to the displayed altitude and velocity. Compare those displayed units with the response's units field; done means the exercise presents the correct unit measure for both values.

Written by the indexing model from the issue text.