FROMGIT: erofs: fix broken illustration in documentation

Illustration was broken after ReST conversion by accident.
(checked by 'make SPHINXDIRS="filesystems" htmldocs')

Link: https://lore.kernel.org/r/20210510162506.28637-1-xiang@kernel.org


Fixes: e66d8631 ("docs: filesystems: convert erofs.txt to ReST")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Gao Xiang <xiang@kernel.org>
(cherry picked from commit bc267ffd
 https://android.googlesource.com/kernel/common

 android13-5.10)

BUG=b:273658215
TEST=`tast run $DUT arc.Boot.vm`
TEST=`tast run $DUT arc.Playstore.vm`

Change-Id: I5b8196a6c0d0aac0264d5703c70efd6ee1027401
Signed-off-by: Ryuichiro Chiba <chibar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/4583876


Reviewed-by: Hikaru Nishida <hikalium@chromium.org>
Reviewed-by: Sean Paul <sean@poorly.run>