DOCS-16816 s3:ListBucket -> s3:ListObject (#299)

Author: pierwill

source/tutorial/manage-s3-blockstore-storage.txt

@@ -92,7 +92,7 @@ AWS S3 Storage Prerequisites
 
       - ``s3:PutObject``
       - ``s3:GetObject``
-      - ``s3:ListObject``
+      - ``s3:ListBucket``
       - ``s3:DeleteObject``
 
 #. (Optional) If you serve your |onprem| instance on |aws| EC2,