Add release marker for build-id 7122

Author: syssimics

RELEASENOTES-1.4.md

@@ -360,4 +360,5 @@
 - `release 6 6385`
 - `release 7 7080`
 - `note 6` Fixed a bug where very particular hierarchies of `shared` and non-`shared` method overrides together would lead to an internal compiler error (fixes SIMICS-23289).
+- `release 7 7122`
 - `release 6 6437`