Improve equestrian search terms (#1055)

* search term "equestrian arena" added for pitch/equestrian
* search terms "equestrian arena" and "equestrian indoor arena" added for building/riding_hall
* search term "equestrian center" added for leisure/horse_riding

data/presets/building/riding_hall.json

@@ -8,7 +8,8 @@
     },
     "matchScore": 0.5,
     "terms": [
-        "equestrian",
+        "equestrian arena",
+        "equestrian indoor arena",
         "horse riding",
         "indoor arena",
         "indoor ring",

data/presets/leisure/horse_riding.json

@@ -17,8 +17,8 @@
         "area"
     ],
     "terms": [
+        "equestrian center",
         "equestrian facility",
-        "equestrian",
         "horse farm",
         "horse park",
         "horse ranch",

data/presets/leisure/pitch/equestrian.json

@@ -20,7 +20,7 @@
         "dressage arena",
         "dressage ring",
         "dressage",
-        "equestrian",
+        "equestrian arena",
         "horse riding ring",
         "horse riding",
         "horse",