MFH: r568031

www/gitea: Update to 1.13.4

This update fixes security vulnerabilities

• https://blog.gitea.io/2021/03/gitea-1.13.3-is-released/
• https://blog.gitea.io/2021/03/gitea-1.13.4-is-released/

PR: 254130
Submitted by: stb AT lassitu DOT de (maintainer)
Security: 502ba001-7ffa-11eb-911c-0800278d94f
Approved by: portmgr (security blanket)