TTS Outbound Lumen example using bad application ID

[dragonmantank]

https://github.com/Nexmo/nexmo-php-code-snippets/blob/7a4b89d3eb0dd9ed605b3e958ad1f0c3eb8e4591/voice/text-to-speech-outbound-lumen/routes/web.php#L35

I don't think this should be a string. Need to convert this to something that will translate into an actual Application ID.