Sample package.xml:
<?xml version=”1.0″ encoding=”UTF-8″?>
<Package xmlns=”http://soap.sforce.com/2006/04/metadata”>
<types>
<members>Test</members>
<name>RemoteSiteSetting</name>
</types>
<version>50.0</version>
</Package>
<Package xmlns=”http://soap.sforce.com/2006/04/metadata”>
<types>
<members>Test</members>
<name>RemoteSiteSetting</name>
</types>
<version>50.0</version>
</Package>