Update config.example.js

[javorszky]

From

// Example mail config
// Visit http://docs.ghost.org/mail for instructions

mail: {
    transport: 'sendgrid',
    host: 'smtp.sendgrid.net',
    options: {
        service: 'Sendgrid',
        auth: {
            user: '', // Super secret username
            pass: ''  // Super secret password
        }
    }
},

To

// Example mail config
// Visit http://docs.ghost.org/mail for instructions

mail: {
    transport: 'sendgrid',
    options: {
        host: 'smtp.sendgrid.net',
        service: 'Sendgrid',
        auth: {
            user: '', // Super secret username
            pass: ''  // Super secret password
        }
    }
},