doc: fix warning treated as an error

Typical error:

```
Warning, treated as error:
/home/jenkins-build/build/workspace/ceph-ansible-docs-pull-requests/docs/source/day-2/upgrade.rst:2:Title underline too short.
```

Signed-off-by: Guillaume Abrioux <gabrioux@redhat.com>
(cherry picked from commit 5c254861bd)
pull/5504/head
Guillaume Abrioux 2020-07-03 09:14:13 +02:00
parent 14e9672f00
commit fd6420d04e
1 changed files with 1 additions and 1 deletions

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@ -1,5 +1,5 @@
Upgrading the ceph cluster
-------------------
--------------------------
ceph-ansible provides a playbook in ``infrastructure-playbooks`` for upgrading a Ceph cluster: ``rolling_update.yml``.