<div class="hero">
  <div class="container" >
    <h1 class="hero-title">
      <img src="img/typography_blue.svg" style="height:56px;" /></h1>
      <img class="logo" src="img/absl_204px.png" alt="Abseil" />
      <h1 class="hero-lead">Live at Head</h1>
      <a href="{{ site.baseurl }}/about">
    	  <button class="btn btn-abseil waves-effect btn-hero">LEARN MORE</button>
      </a>
      <a href="{{site.baseurl}}/docs/cpp.html">
        <button class="btn btn-abseil waves-effect btn-hero">GET STARTED</button>
      </a>
  </div>
</div>

<div class="hero">
  <div class="container" >
    <h1 class="hero-title">
      <img src="img/typography_blue.svg" style="height:56px;" /></h1>
      <img class="logo" src="img/absl_204px.png" alt="Abseil" />
      <h1 class="hero-lead">Live at Head</h1>
      <a href="{{ site.baseurl }}/about">
    	  <button class="btn btn-abseil waves-effect btn-hero">LEARN MORE</button>
      </a>
      <a href="{{site.baseurl}}/docs/cpp">
        <button class="btn btn-abseil waves-effect btn-hero">GET STARTED</button>
      </a>
  </div>
</div>

Fix broken link on main page.
Fix broken link on main page.

Right now, the [main page](https://abseil.io) has a link "Get started" that [points to a non-existing location](https://abseil.io/docs/cpp.html). This changes it to point to the right (?) [place](https://abseil.io/docs/cpp/).