images.md: remove zero-width space (#35234)

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

site/content/docs/4.6/content/images.md

@@ -53,7 +53,7 @@ Align images with the [helper float classes]({{< docsref "/utilities/float" >}})
 If you are using the `<picture>` element to specify multiple `<source>` elements for a specific `<img>`, make sure to add the `.img-*` classes to the `<img>` and not to the `<picture>` tag.
 
 ```html
-​<picture>
+<picture>
   <source srcset="..." type="image/svg+xml">
   <img src="..." class="img-fluid img-thumbnail" alt="...">
 </picture>