fix typo "ski" instead of "Ski" in activity field (#560)

Hufkratzer · web-flow · commit b369ed2e6e8b · 2022-08-07T13:27:34.000+02:00
diff --git a/data/fields/activity.json b/data/fields/activity.json
@@ -14,7 +14,7 @@
             "bicycle": "Cycling",
             "mtb": "Mountain Biking",
             "horse": "Horseback Riding",
-            "Ski": "Skiing"
+            "ski": "Skiing"
         }
     }
 }
