Add Email Workers to compat matrix

Author: irvinebroque

src/content/docs/workers/static-assets/compatibility-matrix.mdx

@@ -58,6 +58,7 @@ We plan to bridge the gaps between Workers and Pages and provide ways to migrate
 | [Assets](/workers/static-assets/binding/)                                           | ✅      | ✅      |
 | [Browser Rendering](/browser-rendering)                                             | ✅      | ✅      |
 | [D1](/d1/build-with-d1/d1-client-api/)                                              | ✅      | ✅      |
+| [Email Workers](/email-routing/email-workers/send-email-workers/)                   | ✅      | ❌      |
 | [Environment Variables](/workers/configuration/environment-variables/)              | ✅      | ✅      |
 | [Hyperdrive](/hyperdrive/)                                                          | ✅      | ❌      |
 | [KV](/kv/)                                                                          | ✅      | ✅      |