docs: fixes syntax error in rich-text.mdx that was breaking build

docs/fields/rich-text.mdx

@@ -26,8 +26,7 @@ The Admin component is built on the powerful [`slatejs`](https://docs.slatejs.or
     Consistent with Payload's goal of making you learn as little of Payload as
     possible, customizing and using the Rich Text Editor does not involve
     learning how to develop for a <em>Payload</em> rich text editor.
-  </strong>{" "}
-  Instead, you can invest your time and effort into learning Slate, an
+  </strong> Instead, you can invest your time and effort into learning Slate, an
   open-source tool that will allow you to apply your learnings elsewhere as
   well.
 </Banner>