comments on migrated issues/prs must link to the comment ID (#18637)

Instead of the issue ID which is not a valid anchor.

Signed-off-by: singuliere <singuliere@autistici.org>

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

templates/repo/issue/view_content/comments.tmpl

@@ -28,7 +28,7 @@
 								{{ .OriginalAuthor }}
 							</span>
 							<span class="text grey">
-								{{$.i18n.Tr "repo.issues.commented_at" (.Issue.HashTag|Escape) $createdStr | Safe}} {{if $.Repository.OriginalURL}}
+								{{$.i18n.Tr "repo.issues.commented_at" (.HashTag|Escape) $createdStr | Safe}} {{if $.Repository.OriginalURL}}
 							</span>
 							<span class="text migrate">
 								({{$.i18n.Tr "repo.migrated_from" ($.Repository.OriginalURL|Escape) ($.Repository.GetOriginalURLHostname|Escape) | Safe }}){{end}}