www/forgejo: Update 7.0.12 → 7.0.13 (fixes security vulnerabilities)

News:
https://forgejo.org/2025-02-release-v10-0-1/

Changelog:
https://codeberg.org/forgejo/forgejo/src/branch/forgejo/release-notes-published/7.0.13.md

PR: 284676
Approved by: Marko Cupać <marko.cupac@mimar.rs> (maintainer)
MFH: 2025Q1

(cherry picked from commit 68df49bce28cc06c143420dce8a925999e5b7456)