Change a domain IP in iOS using a mobileconfig

Question

Earlier I was searching on google for a way to change a domain iP on my device (iOS) then I found an article saying that it is possible using mobileconfig, they left an example but to be truthful, I dont know how to edit it. I want to change localhost.apple.com DNS to 127.0.0.1, Can someone help me change this example to what I want!

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>PayloadContent</key>
    <array>
        <dict>
            <key>Name</key>
            <string>DoT - example.com</string>
            <key>PayloadDescription</key>
            <string>Configures device to use example.com Encrypted DoT</string>
            <key>PayloadDisplayName</key>
            <string>DoT - example.com</string>
            <key>PayloadIdentifier</key>
            <string>com.apple.dnsSettings.managed.AFCA1444-5AEB-44CD-B23D-5D1B3ADCD1EE</string>
            <key>PayloadType</key>
            <string>com.apple.dnsSettings.managed</string>
            <key>PayloadUUID</key>
            <string>A6F9CB2D-F00E-4C3A-90EB-E19E5B872C4F</string>
            <key>PayloadVersion</key>
            <integer>1</integer>
            <key>DNSSettings</key>
            <dict>
                <key>DNSProtocol</key>
                <string>TLS</string>
                <key>ServerAddresses</key>
                <array>
                    <string>xxxx:xxxx:xxxx::xx11</string>
                    <string>x.x.1.1</string>
                </array>
                <key>ServerName</key>
                <string>ns.example.com</string>
            </dict>
        </dict>

</dict>
</plist>