Add Communications Playbook to navigation menu (#115)

* Initial plan

* Add Communications Playbook to menu bar

Co-authored-by: yqtianust <41743566+yqtianust@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: yqtianust <41743566+yqtianust@users.noreply.github.com>

Author: Copilot

config.toml

@@ -164,10 +164,16 @@ pluralizelisttitles = false
     weight     = 8
     parent     = "menu.pubs"
 
+[[menu.main]]
+    name       = "Communications Playbook"
+    url        = "/resources/comms-playbook"
+    weight     = 9
+    parent     = "menu.pubs"
+
 [[menu.main]]
     name       = "Improving Paper and Peer Review Quality"
     url        = "/resources/improve"
-    weight     = 9
+    weight     = 10
     parent     = "menu.pubs"