www/gitea: Security update 1.27.2 => 1.27.3

Release Notes:
https://blog.gitea.com/release-of-1.27.3/

PR: 298072
Approved by: ports@foss-daily.org (maintainer timeout, 2 weeks)
Approved by: osa, vvd (Mentors, implicit)
Security: CVE-2026-66877
Security: CVE-2026-71184
Security: CVE-2026-68957
Security: CVE-2026-60010
Security: CVE-2026-70406
Security: CVE-2026-63792
Security: CVE-2026-66874
Security: CVE-2026-68964
Security: CVE-2026-67577
Security: CVE-2026-66849
Security: CVE-2026-73135
Security: CVE-2026-78433
Security: CVE-2026-70407
Security: CVE-2026-73126
Security: CVE-2026-70400
Security: CVE-2026-70396
Security: CVE-2026-63021
Security: CVE-2026-62925
Security: CVE-2026-73273
Security: CVE-2026-60021
Security: CVE-2026-60018
Security: CVE-2026-73130
Security: CVE-2026-70402
Security: CVE-2026-66853
Security: CVE-2026-71301
Security: CVE-2026-73504
MFH: 2026Q3