Fix update considerations formatting and link to admin management guide

docs/editor_manual/administrator_tasks/managing_workflows.rst

@@ -1,3 +1,5 @@
+.. _managing_workflows:
+
 Managing Workflows
 ==================
 

docs/releases/2.9.rst

@@ -112,11 +112,12 @@ Key points:
 * Prior to 2.9, moderation in Wagtail was performed on a per-revision basis. It is now per page.
 * ``PageRevision.submitted_for_moderation`` will return ``True`` for revisions passing through the old moderation system, but not for the new system
 * Pages undergoing moderation in the old system will not have their moderation halted, and can still be approved/rejected. As a result, you may see
-    two sets of moderation dashboard panels until there are no longer any pages in moderation in the old system
+  two sets of moderation dashboard panels until there are no longer any pages in moderation in the old system
 * No pages can be submitted for moderation in the old system: "Submit for moderation" now submits to the new Workflow system
 * You no longer need the publish permission to perform moderation actions on a page - actions available to each user are now configured per task.
-    With the built in ``GroupApprovalTask``, anybody in a specific set of groups can approve or reject the task.
+  With the built in ``GroupApprovalTask``, anybody in a specific set of groups can approve or reject the task.
 * A data migration is provided to recreate your existing publish-permission based moderation workflow in the new system. If you have made no permissions changes,
-    this should simply create a task approvable by anybody in the `Moderators` group, and assign a workflow with this task to the root page, creating a standard workflow
-    for the entire page tree. However, if you have a complex nested set of publish page permissions, the created set of workflows will be more complex as well - you may wish to
-    inspect the created workflows and tasks in the new ``Settings/Workflows`` admin area and potentially simplify them.
+  this should simply create a task approvable by anybody in the `Moderators` group, and assign a workflow with this task to the root page, creating a standard workflow
+  for the entire page tree. However, if you have a complex nested set of publish page permissions, the created set of workflows will be more complex as well - you may wish to
+  inspect the created workflows and tasks in the new ``Settings/Workflows`` admin area and potentially simplify them.
+  See :ref:`managing_workflows` for the administrator guide.