The link to pull request on ui is wrong

[a1012112796 (赵智超)]

Hello, I found a bug that the link to pull request for gh on ui is not right, Please have a look, Thanks.

view:

real: https://github.com/go-gitea/gitea/pull/16125
get: https://github.com/go-gitea/gitea/tree/undefined

link:

Drone CI