docs upd

Author: rashtao

README.md

@@ -1259,7 +1259,7 @@ document as generated by the query.
 ## Geo data modeling
 
 To demonstrate Geospatial queries we create a new entity class `Location` with a field `location` of type `org.springframework.data.geo.Point`. We
-also have to create a geo index on this field. We can do so by annotating the field with `@GeoIndexed`. As you probably
+also have to create a geo index on this field. We can do so by annotating the field with `@GeoIndexed(geoJson = true)`. As you probably
 remember we have already used an index in our `Character` class, but we annotated the type and not the affected fields.
 Spring Data ArangoDB offers two ways of defining an index. With `@<IndexType>Indexed` annotations indexes for single
 fields can be defined. If the index should include multiple fields the `@<IndexType>Index` annotations can be used on
@@ -1284,7 +1284,7 @@ public class Location {
     @Id
     private String id;
     private final String name;
-    @GeoIndexed
+    @GeoIndexed(geoJson = true)
     private final Point location;
 
     public Location(final String name, final Point location) {