navigation: latest navigation file update

Signed-off-by: Hofi <hofione@gmail.com>

Author: HofiOne

_data/navigation.yml

@@ -1089,6 +1089,8 @@ admin-guide-nav:
       url: /admin-guide/190_The_syslog-ng_manual_pages/009_syslog-ng_manual
     - title: "The syslog-ng.conf manual page"
       url: /admin-guide/190_The_syslog-ng_manual_pages/010_syslog-ng_conf
+    - title: "The persist-tool manual page"
+      url: /admin-guide/190_The_syslog-ng_manual_pages/011_persist-tool
   - title: "About us"
     url: /admin-guide/200_About/README
     subnav: