topology/sysfs: get rid of htmldoc warning

Stephen Rothwell reported the following warning caused by commit
f1045056 ("topology/sysfs: rework book and drawer topology
ifdefery"):

Documentation/admin-guide/cputopology.rst:49: WARNING: Block quote
ends without a blank line; unexpected unindent.

To fix this remove the extra indentation again.

Fixes: f1045056 ("topology/sysfs: rework book and drawer topology ifdefery")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://lore.kernel.org/r/Ya4Ht2K9x2+lUtuR@osiris


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>