Documentation/ABI: sysfs-fs-erofs: update supported features

Add missing feaures for sysfs-fs-erofs feature doc.

Signed-off-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20230209051128.10571-1-zbestahu@gmail.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

Documentation/ABI/testing/sysfs-fs-erofs

@@ -4,7 +4,8 @@ Contact:	"Huang Jianan" <huangjianan@oppo.com>
 Description:	Shows all enabled kernel features.
 		Supported features:
 		zero_padding, compr_cfgs, big_pcluster, chunked_file,
-		device_table, compr_head2, sb_chksum.
+		device_table, compr_head2, sb_chksum, ztailpacking,
+		dedupe, fragments.
 
 What:		/sys/fs/erofs/<disk>/sync_decompress
 Date:		November 2021