Update get-or-set-the-cursor-position-in-a-content-editable-element.mdx

[saona-raimundo]

Thanks for this post!
After going through it, I wanted to suggest two small changes.

There are two changes:

1. simplify the creation of a range (create a new range instead of cloning one, since we do not use any information from the clone)
2. A typo fix in a html closing element