Add missing deprecated tag to max-zone-ttl

This option was deprecated in commit 19352dd1877 but at that time
we didn't mark it deprecated in the ARM reference.

diff --git a/doc/arm/reference.rst b/doc/arm/reference.rst
index eec3cce193e11f869fa0a9d62b9e1fd36aafed86..b9c71af7822d619820b4ab31bd0a12b9f630c7f9 100644 (file)
--- a/doc/arm/reference.rst
+++ b/doc/arm/reference.rst
@@ -1902,7 +1902,7 @@ default is used.
    cannot be longer than a week.
 
 :any:`max-zone-ttl`
-   :tags: zone, query
+   :tags: deprecated
    :short: Specifies a maximum permissible time-to-live (TTL) value, in seconds.
 
    This should now be configured as part of :namedconf:ref:`dnssec-policy`.