Fix corrupted external render content (#35946) and upgrade golang.org/x packages#35950

wxiaoguang merged 2 commits intogo-gitea:release/v1.25go-gitea/gitea:release/v1.25from

GiteaBot:backport-35946-v1.25GiteaBot/gitea:backport-35946-v1.25Copy head branch name to clipboard