Add terms to Dance Hall / Dance School presets (#1182)

data/presets/leisure/dance.json

@@ -17,7 +17,10 @@
         "area"
     ],
     "terms": [
+        "ballet",
+        "ballet studio",
         "ballroom",
+        "dance studio",
         "jive",
         "swing",
         "tango",

data/presets/leisure/dancing_school.json

@@ -16,11 +16,13 @@
         "area"
     ],
     "terms": [
+        "ballet",
+        "ballet studio",
+        "dance teaching",
         "jive",
         "swing",
         "tango",
-        "waltz",
-        "dance teaching"
+        "waltz"
     ],
     "tags": {
         "amenity": "dancing_school"