[releng] Issue #7500: update pixman for F-28 AtomicHost 2-weeks releases

[Suzanne Yeghiayan]

The status of the issue: `update pixman for F-28 AtomicHost 2-weeks releases` of project: `releng` has been updated to: Closed as Fixed by syeghiay.

https://pagure.io/releng/issue/7500