fix: add missing reference for event payload ADR

docs/reference/glossary.rst

@@ -12,10 +12,12 @@ An event has multiple components that are used to define, trigger, and handle th
       An event trigger is the action that causes an event to be emitted. When a trigger action occurs, the associated event is emitted, and any registered event receivers are called to handle the event.
 
     Event Payload
-      The event payload is the data associated with an event that is passed to event receivers when it's triggered. The payload of an event are data attribute classes (e.g. ``CourseEnrollmentData``, ``UserData``, etc.) that carry data about the event such as the event name, timestamp, and any additional metadata and information about the actual event. For more information, see the `ADR: Events Payload`_.
+      The event payload is the data associated with an event that is passed to event receivers when it's triggered. The payload of an event are data attribute classes (e.g. ``CourseEnrollmentData``, ``UserData``, etc.) that carry data about the event such as the event name, timestamp, and any additional metadata and information about the actual event. For more information, see the `Events Payload ADR`_.
 
     Event Type
       The event type is a unique identifier for an event that distinguishes it from other events. For example, ``org.openedx.content_authoring.xblock.published.v1``. The event type is used to identify the event, its purpose, and version. In the event-bus context, the event type is used to connect events to the appropriate topics in the ``EVENT_BUS_PRODUCER_CONFIG``.
 
     Event Definition
       An event definition (or simply, event) is the instantiation of the ``OpenEdxPublicSignal`` class that defines the structure and metadata of an event. This definition includes information such as the event name, description, payload, and version. Event definitions are used to create events which are later imported into the services and are triggered by using the ``send_event`` method.
+
+.. _Events Payload ADR: :doc: `/decisions/0003-events-payload`