Fix typos (#909)

data/fields/fax.json

@@ -2,7 +2,7 @@
     "key": "fax",
     "keys": [
         "fax",
-        "fax:phone"
+        "contact:fax"
     ],
     "type": "tel",
     "label": "Fax",

data/fields/mobile.json

@@ -2,7 +2,7 @@
     "key": "mobile",
     "keys": [
         "mobile",
-        "mobile:phone"
+        "contact:mobile"
     ],
     "type": "tel",
     "label": "Mobile Phone",

data/fields/website.json

@@ -2,7 +2,7 @@
     "key": "website",
     "keys": [
         "website",
-        "website:phone"
+        "contact:website"
     ],
     "type": "url",
     "placeholder": "https://example.com",