Fix the "tox -e docs" faild for kolla-ansible

doc/operating-kolla.rst:104: D000 Explicit markup ends without a blank
line; unexpected unindent.
doc/zun-guide.rst:11: D000 Inline literal start-string without
end-string.

Change-Id: I614e5ccb7b77da6766ddf44219a389346ad2c9ec

doc/operating-kolla.rst

@@ -100,5 +100,5 @@ node to get the admin openrc file.
 ``kolla-ansible -i INVENTORY check`` is used to do post-deployment smoke
 tests.
 
-.. note:: In order to do smoke tests, requires
-``kolla_enable_sanity_checks=yes``.
+.. note::
+  In order to do smoke tests, requires ``kolla_enable_sanity_checks=yes``.

doc/zun-guide.rst

@@ -9,7 +9,7 @@ Preparation and Deployment
 --------------------------
 
 To allow Zun Compute connect to the Docker Daemon, add the following in the
-``docker.service` file on each zun-compute node.
+``docker.service`` file on each zun-compute node.
 
 ::