Remove duplicated list of supported Django versions from README (#145)

Author: johnthagen

README.md

@@ -95,7 +95,7 @@ class SiteConfiguration(SingletonModel):
 Installation
 ------------
 
-This application requires Django 3.2, 4.0, or 4.1.
+This application requires a supported version of Django.
 
 * Install the package using `pip install django-solo`
 * Add ``solo`` or ``solo.apps.SoloAppConfig`` to your ``INSTALLED_APPS`` setting.