use of ".map()" should be ".forEach()"

In "seed/challenges/json-apis-and-ajax.json", the use of ".map()" in the 5th and 6th challenges doesn't make sense -- we're not creating a new array by modifying each element of the response, and in challenge 4, the learner was told to use ".forEach()". Seeing ".map()" instead for no apparent reason would likely be a source of confusion.

challenges/json-apis-and-ajax.json

@@ -239,7 +239,7 @@
         "",
         "        var html = \"\";",
         "",
-        "        json.map(function(val) {",
+        "        json.forEach(function(val) {",
         "",
         "          html += \"<div class = 'cat'>\";",
         "",
@@ -310,7 +310,7 @@
         "        ",
         "        // Only change code above this line.",
         "",
-        "        json.map(function(val){",
+        "        json.forEach(function(val) {",
         "",
         "          html += \"<div class = 'cat'>\"",
         "",