The password reset email is composed via a CB language string. Please see the following approximate location.
IN: components/com_comprofiler/plugin/language/default_language/default_language.php
ON: Lines 954-961
[code:1]
DEFINE('_UE_NEWPASS_SUB','New password for: %s');
DEFINE('_UE_NEWPASS_MSG','The user account %s has this email associated with it.\n'
.'A web user from %s has just requested that a new password be sent.\n\n'
.'Your New Password is: %s\n\n'
.'If you didn\'t ask for this, don\'t worry.'
.' You are seeing this message, not them. If this was an error just log in with your'
.' new password and then change your password to what you would like it to be.');
[/code:1]