vendor: update termbox-go to fix ncdu command on FreeBSD

see https://github.com/nsf/termbox-go/commit/58d4fcbce2a7e6a3a48afbc6b7ec2a916ac33ee0
This commit is contained in:
Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f