fix(challenges): grammatical error

Author: Nirajn2311

challenges/01-responsive-web-design/basic-html-and-html5.json

@@ -365,7 +365,7 @@
       "id": "bad87fee1348bd9aedf08802",
       "title": "Uncomment HTML",
       "description": [
-        "Commenting is a way that you can leave comments for other developers within your code without affecting the resulting output that is displayed the end user.",
+        "Commenting is a way that you can leave comments for other developers within your code without affecting the resulting output that is displayed to the end user.",
         "Commenting is also a convenient way to make code inactive without having to delete it entirely.",
         "Comments in HTML starts with <code>&#60;!--</code>, and ends with a <code>--&#62;</code>",
         "<hr>",