assets + logo change

_includes/footer.html

@@ -1 +1 @@
-<p><small>Powered by <a href="https://jekyllrb.com/">Jekyll</a> &mdash; Based on a theme from <a href="https://www.bodunhu.com/">BDHU</a>, <a href="https://pixabay.com/photos/gentoo-penguin-penguin-calgary-zoo-1502922/">logo credits</a></small></p>
+<p><small>Powered by <a href="https://jekyllrb.com/">Jekyll</a> &mdash; Based on a theme from <a href="https://www.bodunhu.com/">BDHU</a>, logo from <a href="https://lillimon.crd.co/">Lillimon</a></small></p>