Add core-bundle-cb_io to MODULES.md.

Author: rpiaggio

doc/MODULES.md

@@ -118,6 +118,7 @@ These are all the modules meant for end-user selection.
 | `callback-ext-cats_effect` | For classes in the `callback` module: <ul><li>`cats.effect.{Sync,Async}` instances</li><li>Conversions from/to `cats.effect.{SyncIO,IO}`</li></ul>  |
 | `core`                     | Core scalajs-react functionality with `{Callback,AsyncCallback}` as the default effects |
 | `core-bundle-cats_effect`  | Core scalajs-react functionality with `cats.effect.{SyncIO,IO}` as the default effects<br>*(Note: `callback` module not included. Add as a separate dependency if required.)* |
+| `core-bundle-cb_io`        | Core scalajs-react functionality with `Callback` as the default sync effect and `cats.effect.IO` as the default async effect.<br>*(Note: both `callback` and `core-ext-cats_effect` modules are included.* |
 | `core-ext-cats`            | Extensions to the `core` module for Cats |
 | `core-ext-cats_effect`     | Extensions to the `core` module for Cats Effect |
 | `extra`                    | Optional utils exclusive to scalajs-react. ([details](./EXTRA.md)) |