Fix backport #23336 (#23584)

Author: yp05327

templates/repo/issue/new_form.tmpl

@@ -202,7 +202,7 @@
 				<div class="selected">
 					{{if .Project}}
 						<a class="item muted sidebar-item-link" href="{{.Project.Link}}">
-							{{if .IsOrganizationProject}}{{svg "octicon-project-symlink" 18 "gt-mr-3"}}{{else}}{{svg "octicon-project" 18 "gt-mr-3"}}{{end}}
+							{{if .Project.IsOrganizationProject}}{{svg "octicon-project-symlink" 18 "gt-mr-3"}}{{else}}{{svg "octicon-project" 18 "gt-mr-3"}}{{end}}
 							{{.Project.Title}}
 						</a>
 					{{end}}