gluon-web-node-role: fix node role list

Fixes: 4249d65a ("treewide: fix luacheck warnings")
Closes: #1851

package/gluon-web-node-role/luasrc/lib/gluon/config-mode/model/admin/noderole.lua

@@ -18,7 +18,7 @@ s = f:section(Section, nil, translate(
 o = s:option(ListValue, "role", translate("Role"))
 o.default = role
 for _, role_value in ipairs(site.roles.list()) do
-	o:value(role, site_i18n.translate('gluon-web-node-role:role:' .. role_value))
+	o:value(role_value, site_i18n.translate('gluon-web-node-role:role:' .. role_value))
 end
 
 function o:write(data)