Fix wrong property name (#40636)

docs/reference/ingest/processors/geoip.asciidoc

@@ -27,7 +27,7 @@ uncompressed. The `ingest-geoip` config directory is located at `$ES_HOME/config
 | `ignore_missing`       | no        | `false`                                                                            | If `true` and `field` does not exist, the processor quietly exits without modifying the document
 |======
 
-*Depends on what is available in `database_field`:
+*Depends on what is available in `database_file`:
 
 * If the GeoLite2 City database is used, then the following fields may be added under the `target_field`: `ip`,
 `country_iso_code`, `country_name`, `continent_name`, `region_iso_code`, `region_name`, `city_name`, `timezone`, `latitude`, `longitude`