net/freerdp3: Update 3.27.1 => 3.28.0

Changelog:
https://github.com/FreeRDP/FreeRDP/releases#release-3.28.0

Security: GHSA-pjqx-v446-x7fc
Security: GHSA-9g22-w2gr-vcmp
Security: GHSA-f27x-frr8-j9hc
Security: GHSA-72j9-356v-88xq
Security: GHSA-v64m-xxfw-hrv6
Security: CVE-2026-57158 GHSA-mp3f-59pg-c5pp
Security: CVE-2026-57157 GHSA-47fr-jw86-c3fj
Security: CVE-2026-57156 GHSA-v5wf-j8j4-77h7
Security: GHSA-rq8f-9xjh-pr3m
Sponsored by: UNIS Labs
MFH: 2026Q2

(cherry picked from commit b2818315d9d0762f4e028bfd784087a409ec77bd)