Update reference index page.

Author: TimothyBJacobs

reference.md

@@ -75,6 +75,10 @@ This API reference provides information on the specific endpoints available thro
     <td><a href="https://developer.wordpress.org/rest-api/reference/search-results/">Search</a></td>
     <td><code>/wp/v2/search</code></td>
   </tr>
+  <tr>
+    <td><a href="https://developer.wordpress.org/rest-api/reference/block-types/">Block Types</a></td>
+    <td><code>/wp/v2/block-types</code></td>
+  </tr>
   <tr>
     <td><a href="https://developer.wordpress.org/rest-api/reference/wp_blocks/">Blocks</a></td>
     <td><code>/wp/v2/blocks</code></td>
@@ -87,6 +91,14 @@ This API reference provides information on the specific endpoints available thro
     <td><a href="https://developer.wordpress.org/rest-api/reference/rendered-blocks/">Block Renderer</a></td>
     <td><code>/wp/v2/block-renderer</code></td>
   </tr>
+  <tr>
+    <td><a href="https://developer.wordpress.org/rest-api/reference/block-directory-items/">Block Directory Items</a></td>
+    <td><code>/wp/v2/block-directory/search</code></td>
+  </tr>
+  <tr>
+    <td><a href="https://developer.wordpress.org/rest-api/reference/plugins/">Plugins</a></td>
+    <td><code>/wp/v2/plugins</code></td>
+  </tr>
 </table>
 
 ## A Distributed API