Update footer.html

Author: jmarkakis

_includes/footer.html

@@ -10,6 +10,6 @@
 </div>
 
 <div class="page__footer-copyright">
-  &copy; {{ site.time | date: '%Y' }} {{ site.name }}, {{ default: "Powered by" }} <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://github.com/academicpages/academicpages.github.io">AcademicPages</a>, a fork of <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.<br />
+  &copy; {{ site.time | date: '%Y' }} {{ site.name }} - "Powered by" <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> &amp; <a href="https://github.com/academicpages/academicpages.github.io">AcademicPages</a>, a fork of <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a>.<br />
   Site last updated {{ "now" | date: '%Y-%m-%d' %}}
 </div>