Do not use lower tag names to find releases/tags (#29261)
Fix #26090, see
https://github.com/go-gitea/gitea/issues/26090#issuecomment-
1952013206
Since `TagName` stores the original tag name and `LowerTagName` stores
the lower tag name, it doesn't make sense to use lowercase tags as
`TagNames` in `FindReleasesOptions`.
https://github.com/go-gitea/gitea/blob/
5e72526da4e915791f03af056890e16821bde052/services/repository/push.go#L396-L397
While the only other usage looks correct:
https://github.com/go-gitea/gitea/blob/
5e72526da4e915791f03af056890e16821bde052/routers/web/repo/repo.go#L416