docs: update compatible storybook versions

Author: DylanPiercey

README.md

@@ -44,7 +44,7 @@ So you can develop UI components in isolation without worrying about app specifi
 
 ## Getting Started
 
-> `@storybook/marko@10` Is for storybook@9, for storybook@8 use `@storybook/marko@9` (yes it'd be cool if these were in sync).
+> `@storybook/marko@10` Is for storybook@10 and storybook@9, for storybook@8 use `@storybook/marko@9`.
 
 > `@storybook/marko` >= 7 Only supports Marko 5+.
 > For Marko 4 support use `@storybook/marko@6`.