doc/mgr/prometheus: fix confval reference

Signed-off-by: Piotr Parczewski <piotr@stackhpc.com>
(cherry picked from commit b9b75dafe248e07b21f2958023697397094cc537)

diff --git a/doc/mgr/prometheus.rst b/doc/mgr/prometheus.rst
index f36d8c77c4faa529b6351c9ebd5df396ad2ddd4b..01ff442884b70ca772ff3ace957665d84247b06b 100644 (file)
--- a/doc/mgr/prometheus.rst
+++ b/doc/mgr/prometheus.rst
@@ -75,7 +75,7 @@ in conjunction with multiple Prometheus instances, overload the manager and lead
 to unresponsive or crashing Ceph manager instances.  Hence, the cache is enabled
 by default.  This means that there is a possibility that the cache becomes
 stale.  The cache is considered stale when the time to fetch the metrics from
-Ceph exceeds the configured :confval:``mgr/prometheus/scrape_interval``.
+Ceph exceeds the configured :confval:`mgr/prometheus/scrape_interval`.
 
 If that is the case, **a warning will be logged** and the module will either