Describe the Bug

If the last part of Astro frontmatter has a TS type and doesn't end with a semicolon, the following content is incorrectly highlighted

Steps to Reproduce

1. npm init astro
2. In an Astro file, use this content:

   ---
   type anything = {}
   const a = 123
   ---
   
   <div>
   	<a></a>
   </div>

3. Comment out the a = 123 line to see unexpected highlighting. The initial state is what it should look like in all cases