Fix comment header span. (#13009)

Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

templates/repo/issue/view_content/comments.tmpl

@@ -492,6 +492,7 @@
 																<a class="author"{{if gt .Poster.ID 0}} href="{{.Poster.HomeLink}}"{{end}}>{{.Poster.GetDisplayName}}</a>
 															{{end}}
 															{{$.i18n.Tr "repo.issues.commented_at" .HashTag $createdSubStr | Safe}}
+														</span>
 														<div class="text">
 															<div class="render-content markdown">
 															{{if .RenderedContent}}
@@ -502,7 +503,6 @@
 															</div>
 															<div class="raw-content hide">{{.Content}}</div>
 														</div>
-														</span>
 													</div>
 												</div>
 											</div>