fix(learn): Change example text in create-a-form-element.md (#40542)

* Update create-a-form-element.md

Update example. For issue 40523

* Clearer formatting of example

curriculum/challenges/english/01-responsive-web-design/basic-html-and-html5/create-a-form-element.md

@@ -12,7 +12,11 @@ You can build web forms that actually submit data to a server using nothing more
 
 For example:
 
-`<form action="/url-where-you-want-to-submit-form-data"></form>`
+```html
+<form action="/url-where-you-want-to-submit-form-data">
+  <input>
+</form>
+```
 
 # --instructions--