doc: explain where tls.store stores certificates

By adding a reference/link to the doc about the suricata.yaml
config section pecifying the directory where the certificates
are stored

doc/userguide/configuration/suricata-yaml.rst

@@ -388,6 +388,8 @@ For more advanced configuration options, see :ref:`Eve JSON Output <eve-json-out
 
 The format is documented in :ref:`Eve JSON Format <eve-json-format>`.
 
+.. _suricata-yaml-outputs-tls:
+
 TLS parameters and certificates logging (tls.log)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

doc/userguide/rules/tls-keywords.rst

@@ -229,7 +229,8 @@ The tls.fingerprint buffer is lower case so you must use lower case letters for
 tls.store
 ---------
 
-store TLS/SSL certificate on disk
+store TLS/SSL certificate on disk.
+The location can be specified in the `output.tls-store.certs-log-dir` parameter of the yaml configuration file, cf :ref:`suricata-yaml-outputs-tls`..
 
 ssl_state
 ---------