Documentation/ABI: sysfs-fs-erofs: Fix Sphinx errors

Fix the following warnings from "make htmldocs":

Documentation/ABI/testing/sysfs-fs-erofs:10:
  ERROR: Unexpected indentation.
  WARNING: Block quote ends without a blank line; unexpected unindent.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220324165918.22005-4-hdegoede@redhat.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

Author: jwrdegoede

Documentation/ABI/testing/sysfs-fs-erofs

@@ -9,8 +9,9 @@ Description:	Shows all enabled kernel features.
 What:		/sys/fs/erofs/<disk>/sync_decompress
 Date:		November 2021
 Contact:	"Huang Jianan" <huangjianan@oppo.com>
-Description:	Control strategy of sync decompression
+Description:	Control strategy of sync decompression:
+
 		- 0 (default, auto): enable for readpage, and enable for
-				     readahead on atomic contexts only,
+		  readahead on atomic contexts only.
 		- 1 (force on): enable for readpage and readahead.
 		- 2 (force off): disable for all situations.