Google Tag Manager Container ID allow 4 characters

Hello,

we have some pretty legacy container ID, which is GTM-XXXX and form validates for 5+ characters. Please allow 4+ characters :)

Thank you

const GOOGLE_TAG_MATCH = '(?:GT|UA|G|AW|DC|GTM)-[0-9a-zA-Z]{5,}(?:-[0-9]{1,})?';