docs: add nutmeg info to README file

README.md

@@ -12,8 +12,9 @@ This plugin provides a stable place from where to create and launch your openedx
 | ---------------- | -------------------:|
 |     Juniper      |       >= 1.0 < 2.0  |
 |       Koa        |       >= 2.0 < 3.0  |
-|      Lilac       |         >= 2.0      |
-|      Maple       |         >= 3.0      |
+|      Lilac       |       >= 2.0 < 4.0  |
+|      Maple       |       >= 3.0 < 4.0  |
+|      Nutmeg      |         >= 4.0      |
 
 The following changes to the plugin settings are necessary. If the release you are looking for is
 not listed, then the accumulation of changes from previous releases is enough.
@@ -38,7 +39,7 @@ EOX_THEMING_STORAGE_BACKEND = 'eox_theming.edxapp_wrapper.backends.l_storage'
 EOX_THEMING_EDXMAKO_BACKEND = 'eox_theming.edxapp_wrapper.backends.l_mako'
 ```
 
-### Lilac - Maple
+### Lilac - Maple - Nutmeg
 
 ```
 EOX_THEMING_STORAGE_BACKEND = 'eox_theming.edxapp_wrapper.backends.l_storage'
@@ -48,6 +49,7 @@ EOX_THEMING_STORAGE_BACKEND = 'eox_theming.edxapp_wrapper.backends.l_storage'
 Those settings can be changed in `eox_theming/settings/common.py` or, for example, in ansible configurations.
 
 **NOTE**: the current ``common.py`` works with Open edX lilac version.
+**NOTE**: Nutmeg release not support Django22
 
 
 ## Installation