fix: replace .english.md extension with .md

curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/uncomment-html.md

@@ -0,0 +1,71 @@
+---
+id: bad87fee1348bd9aedf08802
+title: Uncomment HTML
+challengeType: 0
+videoUrl: 'https://scrimba.com/p/pVMPUv/cBmG9T7'
+forumTopicId: 18329
+---
+
+## Description
+<section id='description'>
+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 start with <code>&#60;!--</code> and end with a <code>--&#62;</code>
+</section>
+
+## Instructions
+<section id='instructions'>
+Uncomment your <code>h1</code>, <code>h2</code> and <code>p</code> elements.
+</section>
+
+## Tests
+<section id='tests'>
+
+```yml
+tests:
+  - text: Your <code>h1</code> element should be visible on the page by uncommenting it.
+    testString: assert($("h1").length > 0);
+  - text: Your <code>h2</code> element should be visible on the page by uncommenting it.
+    testString: assert($("h2").length > 0);
+  - text: Your <code>p</code> element should be visible on the page by uncommenting it.
+    testString: assert($("p").length > 0);
+  - text: No trailing comment tags should be visible on the page (i.e. <code>--></code>).
+    testString: assert(!$('*:contains("-->")')[1]);
+
+```
+
+</section>
+
+## Challenge Seed
+<section id='challengeSeed'>
+
+<div id='html-seed'>
+
+```html
+<!--
+<h1>Hello World</h1>
+
+<h2>CatPhotoApp</h2>
+
+<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
+-->
+```
+
+</div>
+
+
+
+</section>
+
+## Solution
+<section id='solution'>
+
+```html
+<h1>Hello World</h1>
+
+<h2>CatPhotoApp</h2>
+
+<p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
+```
+
+</section>