[R2] Update index.mdx (#17801)

Hello team, 

Per the way we use this word in the docs. 

“datasets”

Author: nenizera

src/content/docs/r2/index.mdx

@@ -28,7 +28,7 @@ You can use R2 for multiple scenarios, including but not limited to:
 * Cloud storage for web content
 * Storage for podcast episodes
 * Data lakes (analytics and big data)
-* Cloud storage output for large batch processes, such as machine learning model artifacts or data sets
+* Cloud storage output for large batch processes, such as machine learning model artifacts or datasets
 
  <LinkButton variant="primary" href="/r2/get-started/">Get started</LinkButton> <LinkButton variant="secondary" href="/r2/examples/">Browse the examples</LinkButton>