Correction of readme.

[SysVR]

Add the following line
This was missing and did not work properly, and I thought about it for about 5 minutes. xD

6.Make sure the following add-ons are enabled.Import-Export: VRM format Rigging: VRM Rigify Rigging: Rigify

## Installation

1. Download `vrm_rigify.zip` from the [releases page](https://github.com/Nanoskript/vrm-rigify/releases/tag/latest).
2. Install [VRM Add-on for Blender](https://vrm-addon-for-blender.info/en/) if it is not already installed.
3. Open Blender and go to `Edit` > `Preferences` > `Add-ons`:

   <img src="docs/install.png" width="384px">

4. Click on `Install...` and select `vrm_rigify.zip`.
5. Check the box next to the addon to enable it:

   <img src="docs/enable.png" width="256px">

6.Make sure the following add-ons are enabled.`Import-Export: VRM format` `Rigging: VRM Rigify` `Rigging: Rigify`

7. In the same `Blender Preferences` window, go to `Interface`.
8. Check the box labelled `Developer Extras`. This is necessary to show the addon's commands in Blender's operator
   search menu:

   <img src="docs/developer.png" width="384px">

[Nanoskript]

Thank you! Fixed in cd00b1f. 👍