Add terms to amenity=telephone (#1574)

previously these terms were not found and these are reasonable search terms

data/presets/amenity/telephone.json

@@ -30,7 +30,9 @@
         "payphone",
         "pay phone",
         "phone booth",
-        "phone"
+        "phone",
+        "public phone",
+        "public telephone"
     ],
     "name": "Telephone"
 }