Update links

- Remove Made Mistakes from header nav
- Update MM footer link

_data/navigation.yml

@@ -7,7 +7,4 @@
   url: /posts/
 
 - title: Theme Setup
-  url: /theme-setup/
-
-- title: Made Mistakes
-  url: http://mademistakes.com
+  url: /theme-setup/

_includes/_footer.html

@@ -12,4 +12,4 @@
 </div><!-- /.google-ads -->
 {% endif %}
 
-<span>&copy; {{ site.time | date: '%Y' }} {{ site.owner.name }}. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> using the <a href="http://mademistakes.com/minimal-mistakes/" rel="nofollow">Minimal Mistakes</a> theme.</span>
+<span>&copy; {{ site.time | date: '%Y' }} {{ site.owner.name }}. Powered by <a href="http://jekyllrb.com" rel="nofollow">Jekyll</a> using the <a href="https://mademistakes.com/work/minimal-mistakes-jekyll-theme/" rel="nofollow">Minimal Mistakes</a> theme.</span>