Xtrigger doc improvements

cylc/flow/xtriggers/wall_clock.py

@@ -38,6 +38,9 @@ def wall_clock(offset: str = 'PT0S', sequential: bool = True):
             Wall-clock xtriggers are run sequentially by default.
             See :ref:`Sequential Xtriggers` for more details.
 
+    .. versionchanged:: 8.3.0
+
+       The ``sequential`` argument was added.
     """
     # NOTE: This is just a placeholder for the actual implementation.
     # This is only used for validating the signature and for autodocs.

cylc/flow/xtriggers/workflow_state.py

@@ -36,7 +36,7 @@ def workflow_state(
 
     If the status or output has been achieved, return {True, result}.
 
-    Arg:
+    Args:
         workflow_task_id:
             ID (workflow//point/task:selector) of the target task.
         offset:
@@ -62,6 +62,13 @@ def workflow_state(
             Dict of workflow, task, point, offset,
             status, message, trigger, flow_num, run_dir
 
+    .. versionchanged:: 8.3.0
+
+       The ``workflow_task_id`` argument was introduced to replace the
+       separate ``workflow``, ``point``, ``task``, ``status``, and ``message``
+       arguments (which are still supported for backwards compatibility).
+       The ``flow_num`` argument was added. The ``cylc_run_dir`` argument
+       was renamed to ``alt_cylc_run_dir``.
     """
     poller = WorkflowPoller(
         workflow_task_id,