doc: fix geonames file name
@@ -75,7 +75,7 @@ Detailed information about each individual provider that are within Geocoder.
providers/Gaode.rst
providers/GeocodeFarm.rst
providers/Geocoder-ca.rst
- providers/Geonames.rst
+ providers/GeoNames.rst
providers/GeoOttawa.rst
providers/Google.rst
providers/HERE.rst
