[ROL-2148] Improved: Added the expected Security
 link on the website as per the Apache guidelines

Fixed the issues [1] reported by the Apache Whimsy's TLP Website Checks tool on Roller website.

[1] https://whimsy.apache.org/site/project/roller
diff --git a/content/downloads/downloads.html b/content/downloads/downloads.html
index 5e4f728..57838cd 100644
--- a/content/downloads/downloads.html
+++ b/content/downloads/downloads.html
@@ -69,6 +69,7 @@
                         <li><a href="https://www.apache.org/foundation/sponsorship.html" target="external">Sponsorship</a></li>
                         <li><a href="https://www.apache.org/foundation/thanks.html" target="external">Thanks</a></li>
                         <li><a href="https://www.apache.org/licenses/" target="external">License</a></li>
+                        <li><a href="https://www.apache.org/security/" target="external">Security</a></li>
                     </ul>
                 </li>
             </ul>
diff --git a/content/getinvolved/edit_website.html b/content/getinvolved/edit_website.html
index 5895ab0..3a979f7 100644
--- a/content/getinvolved/edit_website.html
+++ b/content/getinvolved/edit_website.html
@@ -69,6 +69,7 @@
                         <li><a href="https://www.apache.org/foundation/sponsorship.html" target="external">Sponsorship</a></li>
                         <li><a href="https://www.apache.org/foundation/thanks.html" target="external">Thanks</a></li>
                         <li><a href="https://www.apache.org/licenses/" target="external">License</a></li>
+                        <li><a href="https://www.apache.org/security/" target="external">Security</a></li>
                     </ul>
                 </li>
             </ul>
diff --git a/content/index.html b/content/index.html
index edc0ce4..605154e 100644
--- a/content/index.html
+++ b/content/index.html
@@ -69,6 +69,7 @@
                         <li><a href="https://www.apache.org/foundation/sponsorship.html" target="external">Sponsorship</a></li>
                         <li><a href="https://www.apache.org/foundation/thanks.html" target="external">Thanks</a></li>
                         <li><a href="https://www.apache.org/licenses/" target="external">License</a></li>
+                        <li><a href="https://www.apache.org/security/" target="external">Security</a></li>
                     </ul>
                 </li>
             </ul>
diff --git a/content/project/whoweare.html b/content/project/whoweare.html
index f638a88..a68e4de 100644
--- a/content/project/whoweare.html
+++ b/content/project/whoweare.html
@@ -69,6 +69,7 @@
                         <li><a href="https://www.apache.org/foundation/sponsorship.html" target="external">Sponsorship</a></li>
                         <li><a href="https://www.apache.org/foundation/thanks.html" target="external">Thanks</a></li>
                         <li><a href="https://www.apache.org/licenses/" target="external">License</a></li>
+                        <li><a href="https://www.apache.org/security/" target="external">Security</a></li>
                     </ul>
                 </li>
             </ul>
diff --git a/sources/src/main/jbake/templates/header.ftl b/sources/src/main/jbake/templates/header.ftl
index 46ca3a6..1abf0c4 100644
--- a/sources/src/main/jbake/templates/header.ftl
+++ b/sources/src/main/jbake/templates/header.ftl
@@ -69,6 +69,7 @@
                         <li><a href="https://www.apache.org/foundation/sponsorship.html" target="external">Sponsorship</a></li>
                         <li><a href="https://www.apache.org/foundation/thanks.html" target="external">Thanks</a></li>
                         <li><a href="https://www.apache.org/licenses/" target="external">License</a></li>
+                        <li><a href="https://www.apache.org/security/" target="external">Security</a></li>
                     </ul>
                 </li>
             </ul>