Update header links to match spring.io

Author: rwinch

src/partials/header-content.hbs

@@ -51,8 +51,20 @@
             <a class="navbar-item navbar-item-special-2" href="https://start.spring.io">Spring Initializr <svg class="external-link-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><polyline points="15 10.94 15 15 1 15 1 1 5.06 1" fill="none" stroke="currentColor" stroke-miterlimit="10" stroke-width="2"></polyline><polyline points="8.93 1 15 1 15 7.07" fill="none" stroke="currentColor" stroke-miterlimit="10" stroke-width="2"></polyline><line x1="15" y1="1" x2="8" y2="8" fill="none" stroke="currentColor" stroke-miterlimit="10" stroke-width="2"></line></svg></a>
           </div>
         </div>
-
-        <a class="navbar-item" href="https://spring.io/training">Training</a>
+        <div class="navbar-item has-dropdown is-hoverable">
+          <a class="navbar-link" href="#">Academy</a>
+          <div class="navbar-dropdown">
+            <a class="navbar-item" href="https://spring.academy/courses">Courses</a>
+            <a class="navbar-item" href="https://spring.academy/learning-path">Get Certified</a>
+          </div>
+        </div>
+        <div class="navbar-item has-dropdown is-hoverable is-community">
+          <a class="navbar-link" href="#">Support</a>
+          <div class="navbar-dropdown">
+            <a class="navbar-item" href="https://spring.io/support">Overview</a>
+            <a class="navbar-item" href="https://spring.io/security">Security Advisories</a>
+          </div>
+        </div>
         <a class="navbar-item" href="https://spring.io/support">Support</a>
         <div class="navbar-item has-dropdown is-hoverable is-community">
           <a class="navbar-link" href="#">Community</a>