Update scheduled triggers documentation

Clarify behavior of disabled pipelines regarding schedule triggers.
Repair item from ADO: https://dev.azure.com/mseng/AzureDevOps/_workitems/edit/2238274

Author: mariselo

docs/pipelines/process/scheduled-triggers.md

@@ -82,6 +82,7 @@ Scheduled pipelines in YAML have the following constraints.
 - If you specify an `exclude` clause without an `include` clause for `branches`, it's equivalent to specifying `*` in the `include` clause.
 - You can't use pipeline variables when specifying schedules.
 - If you use [templates in your YAML file](templates.md), then the schedules must be specified in the main YAML file and not in the template files.
+- If a pipeline is disabled, updates made to its YAML file will not automatically refresh the schedule triggers.
 
 ### Branch considerations for scheduled triggers