fix: persist mirror repository metadata (#37519)

The migration repository model now carries Website alongside Description, the GitHub/Gitea downloaders populate it, and mirror finalization persists both description and website so the About section is not empty after creating a mirror.

Fixes #37495

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Signed-off-by: cyphercodes <cyphercodes@users.noreply.github.com>
Co-authored-by: cyphercodes <cyphercodes@users.noreply.github.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/migrations/github.go

@@ -205,6 +205,7 @@ func (g *GithubDownloaderV3) GetRepoInfo(ctx context.Context) (*base.Repository,
 		Name:          gr.GetName(),
 		IsPrivate:     gr.GetPrivate(),
 		Description:   gr.GetDescription(),
+		Website:       gr.GetHomepage(),
 		OriginalURL:   gr.GetHTMLURL(),
 		CloneURL:      gr.GetCloneURL(),
 		DefaultBranch: gr.GetDefaultBranch(),