Fix reply octicon (#11821)

Signed-off-by: jolheiser <john.olheiser@gmail.com>

templates/repo/view_list.tmpl

@@ -36,7 +36,7 @@
 	<tbody>
 		{{if .HasParentPath}}
 			<tr class="has-parent">
-				<td colspan="3">{{svg "octicon-mail-reply" 16}}<a href="{{EscapePound .BranchLink}}{{.ParentPath}}">..</a></td>
+				<td colspan="3">{{svg "octicon-reply" 16}}<a href="{{EscapePound .BranchLink}}{{.ParentPath}}">..</a></td>
 			</tr>
 		{{end}}
 		{{range $item := .Files}}

web_src/less/_repository.less

@@ -318,7 +318,7 @@
                     margin-right: 5px;
                     color: #777777;
 
-                    &.octicon-mail-reply {
+                    &.octicon-reply {
                         margin-right: 10px;
                     }