get-info.js

const puppeteer = require('puppeteer');

let scrape = async () => {
  const browser = await puppeteer.launch({headless: false});
  const page = await browser.newPage();
  await page.goto('http://www.tesouro.gov.br/pt/-/rentabilidade-acumulada')
  await page.waitFor(100);

  const result = await page.evaluate(() => {
    page.click('button[value="Baixar arquivo"]')
  })

  browser.close();
  return result;
}

scrape().then((value) => {
  console.log(value);
})