/email/email_template_order_status.html

Code:
logo
Dear $EMAIL_CUSTOMERS_NAME,
$EMAIL_STORE_NAME
$EMAIL_TEXT_ORDER_NUMBER
$EMAIL_TEXT_INVOICE_URL
$EMAIL_TEXT_DATE_ORDERED
$EMAIL_TEXT_STATUS_COMMENTS
$EMAIL_TEXT_STATUS_UPDATED
$EMAIL_TEXT_STATUS_LABEL
$EMAIL_TEXT_STATUS_PLEASE_REPLY
I think that the link is the highlighted entry