Update scheduled workflow docs (#55062)

Author: GhadimiR

content/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows.md

@@ -1033,6 +1033,7 @@ jobs:
 > * Scheduled workflows will only run on the default branch.
 > * In a public repository, scheduled workflows are automatically disabled when no repository activity has occurred in 60 days. For information on re-enabling a disabled workflow, see [AUTOTITLE](/enterprise-server@3.12/actions/using-workflows/disabling-and-enabling-a-workflow#enabling-a-workflow).
 > * For an enterprise with {% data variables.product.prodname_emus %}, scheduled workflows will not run if the last `actor` associated with the scheduled workflow has been deprovisioned (and therefore become suspended) by the {% data variables.product.prodname_emu %} identity provider (IdP). However, if the last `actor` {% data variables.product.prodname_emu %} has not been deprovisioned by the IdP, and has only been removed as a member from a given organization in the enterprise, scheduled workflows will still run with that user set as the `actor`. Similarly, for an enterprise without {% data variables.product.prodname_emus %}, removing a user from an organization will not prevent scheduled workflows which had that user as their `actor` from running. Essentially, triggering a scheduled workflow requires that the status of the `actor` user account associated with the workflow is currently active (i.e. not suspended or deleted). Thus, the _user account's_ status, in both {% data variables.product.prodname_emu %} and non-{% data variables.product.prodname_emu %} scenarios, is what's important, _not_ the user's _membership status_ in the organization where the scheduled workflow is located.
+> * Certain repository events change the `actor` associated with the workflow. For example, a user who changes the default branch of the repository, which changes the branch on which scheduled workflows run, becomes `actor` for those scheduled workflows.
 > * For a deactivated scheduled workflow, if a user with `write` permissions to the repository makes a commit that changes the `cron` schedule on the workflow, the workflow will be reactivated, and that user will become the `actor` associated with any workflow runs. Note that, in this situation, the workflow is not reactivated by any change to the workflow file; you must alter the `cron` value in the workflow and commit this change.
 >
 >   **Example:**