Fix table formatting

Author: rawilk

docs/rich-text/quill.md

@@ -215,6 +215,7 @@ If you need to define JavaScript handlers for a [custom toolbar button](#user-co
 slot to do this. The config slot is inside a JavaScript function that returns an object and has access to the following variables:
 
 | variable | description |
+| --- | --- |
 | `instance` | The Alpine data instance for the quill component. To access to the quill editor instance, you can do so via `instance.__quill` |
 | `quillOptions` | An object containing the options generated by the component |