Fix wrong due date rendering in issue list page (#28588) (#28591)

Backport #28588 by @yardenshoham

It included the hours, minutes, and seconds. By removing these, the date
renders correctly.

Signed-off-by: Yarden Shoham <git@yardenshoham.com>
Co-authored-by: Yarden Shoham <git@yardenshoham.com>

templates/shared/issuelist.tmpl

@@ -114,7 +114,7 @@
 						<span class="due-date flex-text-inline" data-tooltip-content="{{ctx.Locale.Tr "repo.issues.due_date"}}">
 							<span{{if .IsOverdue}} class="text red"{{end}}>
 								{{svg "octicon-calendar" 14}}
-								{{DateTime "short" .DeadlineUnix}}
+								{{DateTime "short" (.DeadlineUnix.Format "2006-01-02")}}
 							</span>
 						</span>
 					{{end}}