The short description field is not available on pm_project table or dmn_demand table with configuring form layout.
Jakarta Patch 9c
When reviewing the short_description dictionary on the task table, we can see there are lables defined for various tables:
pm_project: Project Name
dmn_demand: Program Name
When configuring the form layout, we can see the fields under the defined labels.
Modify the labels for short description as needed.