Allow emoji on review head comments (#10159)

Co-authored-by: techknowlogick <matti@mdranta.net>

templates/repo/issue/view_content/comments.tmpl

@@ -345,7 +345,7 @@
 			{{if .Content}}
 				<div class="detail">
 					<span class="octicon octicon-quote"></span>
-					<span class="text grey">{{.Content}}</span>
+					<span class="text grey has-emoji">{{.Content}}</span>
 				</div>
 			{{end}}
 			{{ range $filename, $lines := .Review.CodeComments}}