DOCSP-16304 makes Versioned API Reference page a sub-page of the Versioned API page

Author: jmd-mongo

snooty.toml

@@ -139,6 +139,7 @@ toc_landing_pages = [
    "/reference/replication",
    "/reference/security",
    "/reference/sharding",
+   "/reference/versioned-api",
    "/release-notes/2.4",
    "/release-notes/2.6",
    "/release-notes/3.0",

source/reference.txt

@@ -82,9 +82,6 @@ Reference
 :doc:`/reference/versioned-api`
    Describes the Versioned API.
 
-:doc:`/reference/versioned-api-reference`
-   Migrate to a Later API Version.
-
 .. seealso::
 
    The
@@ -116,4 +113,3 @@ Reference
    /reference/mongodb-defaults
    /reference/server-sessions
    /reference/versioned-api
-   /reference/versioned-api-reference

source/reference/versioned-api.txt

@@ -331,3 +331,9 @@ This table shows error responses for problematic Versioned API requests.
        ``{ apiDeprecationErrors: true }`` but omits 
        :ref:`apiVersion <api-version-desc>`.
 
+
+.. toctree::
+   :titlesonly:
+   :hidden:
+
+   /reference/versioned-api-reference