Update r2.mdx

Minor change to clarify existence of local storage of images.

Author: FoamToaster

pages/configuration/r2.mdx

@@ -5,7 +5,7 @@ description: How to use R2
 
 import { Steps } from 'nextra/components';
 
-At the moment, the only way to upload images is to configure R2. It's free.<br />
+If you do not wish to (or can't) use local storage, an alternative way to upload images is to configure R2. It's free.<br />
 
 <Steps>