Easy Property Listings

Hello Im trying to change some title from Property to Sales
I use this a code from this url but is not working

url: https://codex.easypropertylistings.com.au/article/112-modify-admin-labels-of-each-listing-post-type

the code that I used

function epl_property_labels($labels) {
$labels = array(
‘property’ => __(‘Sales’, ‘epl’),

);
return $labels;
}
add_filter(‘epl_property_labels’, ‘set_property_labels’);