Update site footer per Linux Foundation (#9244) (#9256)

(cherry picked from commit 7a4399e)

Signed-off-by: Fanit Kolchina <kolchfa@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

_includes/footer.html

@@ -69,12 +69,8 @@ <h4>{{ column.title }}</h4>
             </div>
           </div>
           <div class="footer--legal-rows-wrapper--row">
-            &copy; OpenSearch contributors, {{ 'now' | date: "%Y" }}. OpenSearch is a <a href="/trademark-brand-policy.html">registered trademark</a> of Amazon Web Services.</a> <br /><br /> 
-            {% if page.notice == true or layout.notice == true %} OpenSearch includes certain Apache-licensed Elasticsearch code from Elasticsearch B.V. and other source code. Elasticsearch B.V. is not the source of that other source code. ELASTICSEARCH is a registered trademark of Elasticsearch B.V. <br /><br /> {% endif %}
-
-            © 2005-2021 <a href="https://www.djangoproject.com/foundation/"> Django Software Foundation</a> and individual contributors. Django is a
-            <a href="https://www.djangoproject.com/trademarks/">registered trademark</a> of the Django Software Foundation.<br />
-            This website was forked from the BSD-licensed <a href="https://github.com/django/djangoproject.com/">djangoproject.com</a> originally designed by <a href="https://www.threespot.com">Threespot</a> <span class="ampersand">&amp;</span> <a  href="https://andrevv.com/">andrevv</a>.
+            Copyright &copy; OpenSearch Project&mdash;a series of LF Projects, LLC.
+            For website terms of use, trademark policy, and other project policies, see <a href="https://lfprojects.org">https://lfprojects.org</a>.
           </div>
         </div>
       </div>