Revert "Fix a broken link which has changed on the JSON Schema website."

It was reverted upstream in json-schema-org/website#1010.

This reverts commit 08395e9.

Author: Julian

docs/faq.rst

@@ -56,9 +56,10 @@ Difficult as this may sound for new users, at this point it at least means they
 
 .. seealso::
 
-    `Draft 2019-09's release notes on format <https://json-schema.org/draft/2019-09#draft-2019-09-release-notes>`_
+    `Draft 2019-09's release notes on format <https://json-schema.org/draft/2019-09/release-notes.html#format-vocabulary>`_
 
-        for upstream details on the behavior of format and how it has changed in ``draft2019-09``
+        for upstream details on the behavior of format and how it has changed
+        in ``draft2019-09``
 
     `validating formats`