nominatim: increase number of threads for postcode updates
nominatim: increase number of threads for postcode updates

tomhughes/openstreetmap-chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,zerebubuth/openstreetmap-chef,openstreetmap/chef,zerebubuth/openstreetmap-chef,zerebubuth/openstreetmap-chef,zerebubuth/openstreetmap-chef,openstreetmap/chef,tomhughes/openstreetmap-chef,openstreetmap/chef,tomhughes/openstreetmap-chef,openstreetmap/chef,openstreetmap/chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef,tomhughes/openstreetmap-chef,openstreetmap/chef,zerebubuth/openstreetmap-chef,openstreetmap/chef,openstreetmap/chef,zerebubuth/openstreetmap-chef,tomhughes/openstreetmap-chef