add Croissant 1.1 backward incompatible changes to changelog #12014

Author: pdurbin

doc/sphinx-guides/source/api/changelog.rst

@@ -7,6 +7,11 @@ This API changelog is experimental and we would love feedback on its usefulness.
     :local:
     :depth: 1
 
+v6.11
+-----
+
+- The Croissant :ref:`metadata export format <metadata-export-formats>` has been updated from version 1.0 to 1.1, which is reflected in the ``conformsTo`` property. ``@vocab`` and ``sc`` properties now use "http" as `recommended <https://github.com/mlcommons/croissant/pull/929#pullrequestreview-3079137662>`_. The unused ``wd`` property has been dropped.
+
 v6.10
 -----
 - The following GET APIs will now return ``400`` if a required Guestbook Response is not supplied. A Guestbook Response can be passed to these APIs in the JSON body using a POST call. See the notes under :ref:`basic-file-access` and :ref:`download-by-dataset-by-version` for details.
@@ -29,7 +34,6 @@ v6.10
 
   - **/api/access/datafile/{id}/requestAccess**
 
-
 v6.9
 ----