doc/mgr/prometheus: fix confval reference

Signed-off-by: Piotr Parczewski <piotr@stackhpc.com>

diff --git a/doc/mgr/prometheus.rst b/doc/mgr/prometheus.rst
index afbbdcf268e150244ab1e62a3e92c277500652b7..62dcf5bfd45bde93901a05c2a328f72142bf0d70 100644 (file)
--- a/doc/mgr/prometheus.rst
+++ b/doc/mgr/prometheus.rst
@@ -76,7 +76,7 @@ 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