docs: Show consul intention list in nav sidebar

Ensure `consul intention list` command is displayed in the navigation
sidebar.

Fixes #12036

Author: blake

Diff for: website/data/commands-nav-data.json

@@ -291,6 +291,10 @@
         "title": "get",
         "path": "intention/get"
       },
+      {
+        "title": "list",
+        "path": "intention/list"
+      },
       {
         "title": "match",
         "path": "intention/match"