fix(challenges): Incorrect html closing tag

Nirajn2311 · scissorsneedfoodtoo · commit a1464f09d324 · 2018-08-23T15:59:36.000+09:00
diff --git a/challenges/01-responsive-web-design/basic-html-and-html5.json b/challenges/01-responsive-web-design/basic-html-and-html5.json
@@ -1790,7 +1790,7 @@
             "    <li>other cats</li>",
             "  </ol>",
             "  <input type=\"text\" placeholder=\"cat photo URL\">",
-            "<main>"
+            "</main>"
           ],
           "head": [],
           "tail": []
