Reported error from customer

[bermudezmt]

https://twilio.zendesk.com/agent/tickets/6000658

As per https://github.com/twilio/twilio-php/blob/main/src/Twilio/TwiML/TwiML.php, the namespace should be Twilio\TwiML.

[sarahcstringer]

LGTM.
Just noticing that I see some other places where this mistake might be happening:

❯ grep -r "use Twilio" . | grep Twiml
./voice/queueing/agent/queue-agent.5.x.php:use Twilio\Twiml\VoiceResponse;
./voice/queueing/caller/queue-caller.5.x.php:use Twilio\Twiml\VoiceResponse;
./voice/queueing/redirect/queue-redirect.5.x.php:use Twilio\Twiml\VoiceResponse;
./rest/messages/generate-twiml-dynamic-sms/generate-twiml-dynamic-sms.5.x.php:use Twilio\Twiml\MessagingResponse;
./rest/messages/generate-twiml-sms/generate-twiml-sms.5.x.php:use Twilio\Twiml\MessagingResponse;
./rest/messages/generate-twiml-sms-voice/example-1.5.x.php:use Twilio\Twiml\VoiceResponse;
./rest/messages/generate-twiml-mms/generate-twiml-mms.5.x.php:use Twilio\Twiml\MessagingResponse;
./rest/taskrouter/twiml/example2/example/example.5.x.php:use Twilio\Twiml\VoiceResponse;
./rest/taskrouter/twiml/example4/example/example.5.x.php:use Twilio\Twiml\VoiceResponse;
./rest/taskrouter/twiml/example3/example/example.5.x.php:use Twilio\Twiml\VoiceResponse;
./rest/taskrouter/twiml/example1/example/example.5.x.php:use Twilio\Twiml\VoiceResponse;

[bermudezmt]

Woof. Thank you for that! Let me merge this PR and then send you a follow-up one.