Add Markdown rendering to copyright statement

Signed-off-by: Ethan Madison <ethan@ethanmad.com>

layouts/partials/footer.html

@@ -5,7 +5,7 @@
 
 <footer class="doc-footer">
 	{{ partial "social-links.html" . }}
-	{{ with .Site.Copyright | safeHTML }}<p>{{ . }}</p>{{ end }}
+	{{ with .Site.Copyright | markdownify }}<p>{{ . }}</p>{{ end }}
 </footer>
 
 <script src="{{ $baseUrl }}/js/jquery.min.js"></script>