Fix the blog link in the footer opening in the same tab (#1600)

Co-authored-by: Anjula Shanaka <[email protected]>

assets/content/static/footer.html

@@ -62,8 +62,7 @@ <h4 class="mb-0 font-weight-light">Get in touch with using any of these platform
                     <a href="/team.html" class="nav-link">Team</a>
                 </li>
                 <li class="nav-item">
-                    <a href="https://sefglobal.medium.com/" class="nav-link">Blog</a>
-                    <!-- <a href="https://sefglobal.org/blog.html" class="nav-link">Blog</a> -->
+                    <a href="https://sefglobal.medium.com/" target="_blank" class="nav-link">Blog</a>
                 </li>
                 <li class="nav-item">
                     <a href="/join-us.html" class="nav-link">Join Us</a>