Update 'pt.json'

display bus route in zoom level 10

pt.json

@@ -8,7 +8,7 @@
         "pt-br": "Mapa de transporte público"
     },
     "query": {
-        "12": "relation[type=route][route~\"^(subway|monorail|ferry|train|bus)$\"];",
+        "10": "relation[type=route][route~\"^(subway|monorail|ferry|train|bus)$\"];",
         "14": [
             "(",
             "relation[type=route][route~\"^(subway|monorail|aerialway|bus|trolleybus|ferry|train|tram)$\"];",