newsfragments: Add release note for MR !666

Full link: https://gitlab.com/sane-project/backends/-/merge_requests/666

newsfragments/escl_new_models.backend

@@ -1,4 +1,7 @@
 escl: Added support for Brother DCP-J772DW and Epson ET-2750 scanners.
 escl: Marked the following scanners as supported in documentation:
+ - Brother MFC-J985DW
+ - Brother MFC-J1300DW
  - Canon PIXMA G4511
+ - Canon PIXMA TS8350 Series
  - Epson ET-6100