chore: Change Learn link into Docs link (#5652)

Author: steverydz

templates/_header.html

@@ -53,42 +53,12 @@
                     </a>
                   </li>
                   <li
-                  class="p-navigation__item--dropdown-toggle {% if request.path == '/blog' %}is-selected{% endif %}"
-                  id="learn-link"
-                  role="menuitem"
+                    class="p-navigation__item {% if request.path == '/docs' or request.path.startswith('/docs/') %}is-selected{% endif %}"
+                    role="menuitem"
                   >
-                    <a class="p-navigation__link" href="#learn-menu" aria-controls="learn-menu">
-                      Learn
+                    <a class="p-navigation__link" href="/docs">
+                      Docs
                     </a>
-                    <div class="p-navigation__dropdown--container">
-                      <ul class="p-navigation__dropdown" id="learn-menu" aria-hidden="true">
-                        <li class="p-navigation__item--dropdown-close">
-                          <button href="#learn-menu" aria-controls="learn-menu" class="p-navigation__link js-back-button">
-                            Back
-                          </button>
-                        </li>
-                        <li>
-                          <a class="p-navigation__dropdown-item" href="/blog">
-                            Blog
-                          </a>
-                        </li>
-                        <li>
-                          <a class="p-navigation__dropdown-item" href="/build">
-                            Build
-                          </a>
-                        </li>
-                        <li>
-                          <a class="p-navigation__dropdown-item" href="{{ url_for('docs.document_view') }}">
-                            Docs
-                          </a>
-                        </li>
-                        <li>
-                          <a class="p-navigation__dropdown-item" href="/docs/snap-tutorials">
-                            Tutorials
-                          </a>
-                        </li>
-                      </ul>
-                    </div>
                   </li>
                   <li
                     class="p-navigation__item {% if request.path == '/iot' %}is-selected{% endif %}"