Fix typo

doc/advanced-topics.md

@@ -48,8 +48,8 @@ Agent.
 
 ### GeoJSON support
 
-The defined `type` of any GeoJSON attribute can be any set to any of the standard NGSI-v2 GeoJSON types - (e.g.
-`geo:json`, `geo:point`). NGSI-LD formats such as `GeoProperty`, `Point` and `LineString` are also accepted `type`
+The defined `type` of any GeoJSON attribute can be any set to any of the standard **NGSI-v2** GeoJSON types - (e.g.
+`geo:json`, `geo:point`). **NGSI-LD** formats such as `GeoProperty`, `Point` and `LineString` are also accepted `type`
 values. If the latitude and longitude are received as separate measures, the
 [expression language](expressionLanguage.md) can be used to concatenate them.
 
@@ -103,7 +103,7 @@ the following formats:
 }
 ```
 
-Because GeoJSON types (e.g. `Point`, `LineString` etc.) are native types in **NGSI-LD**, automatic GeoJSON convertion is switched on for NGSI-LD by default.
+Because GeoJSON types (e.g. `Point`, `LineString` etc.) are native types in **NGSI-LD**, automatic GeoJSON conversion is switched on for NGSI-LD by default.
 
 With **NGSI-v2**, for backwards compatibility reasons, automatic GeoJSON conversion for types other than `geo:json` is turned off by default.
 Add the `config.autocastGeoJSON` configuration to enable GeoJSON conversion