fix(challenges): Remove self-closing slashes from <img> and <input> (#16985)

Author: msiadak

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

@@ -558,13 +558,13 @@
       "description": [
         "You can add images to your website by using the <code>img</code> element, and point to a specific image's URL using the <code>src</code> attribute.",
         "An example of this would be:",
-        "<code>&#60img src=\"https://www.your-image-source.com/your-image.jpg\" /&#62</code>",
-        "Note that in most cases, <code>img</code> elements are self-closing.",
+        "<code>&#60img src=\"https://www.your-image-source.com/your-image.jpg\"&#62</code>",
+        "Note that <code>img</code> elements are self-closing.",
         "All <code>img</code> elements <strong>must</strong> have an <code>alt</code> attribute. The text inside an <code>alt</code> attribute is used for screen readers to improve accessibility and is displayed if the image fails to load.",
         "Note: If the image is purely decorative, using an empty <code>alt</code> attribute is a best practice.",
         "Ideally the <code>alt</code> attribute should not contain special characters unless needed.",
         "Let's add an <code>alt</code> attribute to our <code>img</code> example above:",
-        "<code>&#60img src=\"https://www.your-image-source.com/your-image.jpg\" alt=\"Author standing on a beach with two thumbs up.\" /&#62</code>",
+        "<code>&#60img src=\"https://www.your-image-source.com/your-image.jpg\" alt=\"Author standing on a beach with two thumbs up.\"&#62</code>",
         "<hr>",
         "Let's try to add an image to our website:",
         "Insert an <code>img</code> tag, before the <code>h2</code> element.",
@@ -1287,7 +1287,7 @@
         "Now let's create a web form.",
         "Input elements are a convenient way to get input from your user.",
         "You can create a text input like this:",
-        "<code>&#60;input type=\"text\" /&#62;</code>",
+        "<code>&#60;input type=\"text\"&#62;</code>",
         "Note that <code>input</code> elements are self-closing.",
         "<hr>",
         "Create an <code>input</code> element of type <code>text</code> below your lists."