message: Fix up the Twitter link in the nav bar
diff: <a href="{{ site.github.repository_url }}" target="_self" class="btn">
  <svg version="1.1" width="16" height="16" viewBox="0 0 16 16" class="octicon octicon-mark-github" aria-hidden="true">
  <path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0 0 16 8c0-4.42-3.58-8-8-8z"></path>
  - </svg> <span>View on GitHub</span></a>
  - <a href="https://twitter.com/ExtratermDev">{% include twitter_logo.ext %}@ExtratermDev</a>
  -</span></div>
  + </svg> <span>View on GitHub</span></a></span><a href="https://twitter.com/ExtratermDev">{% include twitter_logo.ext %}@ExtratermDev</a>
  +</div>
  