Field mapping profile create-edit screen for instances: add sentence

Purpose: To provide info on why so many field of the Instance field mapping screen are not mappable

As a staff person working with Data Import field mapping profiles
I want information on why so many Instance fields are not mappable
So that I can better understand the field mapping screen

Scenarios

1. Scenario 1
   • Given the Field mapping profile Create-Edit screen
   • When the FOLIO record type = Instance
   • Then add the following sentence below the Field mapping , Instance header, and above the Administrative data accordion:
     • Inactive fields cannot be mapped because they are controlled by the system or by the library's MARC-Instance mapping profile
     • NOTE: the wording in the mockup is slightly different. Use the wording in the Jira description
2. Scenario 2
   • Ensure this story passes Accessibility testing
3. Scenario 3
   • Ensure automated testing coverage for this new code is 80% plus and confirm with screenshot