Update link to blog

We host our blog on github now

Signed-off-by: Natanael Copa <ncopa@mirantis.com>

Author: ncopa

index.html

@@ -75,7 +75,7 @@
         <a class="nav-link" href="https://docs.k0sproject.io" target="_blank">Docs</a>
       </li>
       <li class="nav-item">
-        <a class="nav-link" href="https://medium.com/k0sproject" target="_blank">Blog</a>
+        <a class="nav-link" href="https://blog.k0sproject.io" target="_blank">Blog</a>
       </li>
       <li class="nav-item">
         <a class="nav-link" href="#support">Support</a>