add newline in footer
diff --git a/_includes/themes/apache/footer.html b/_includes/themes/apache/footer.html
index 6d2989e..c58508f 100644
--- a/_includes/themes/apache/footer.html
+++ b/_includes/themes/apache/footer.html
@@ -19,6 +19,7 @@
                 {% endif %}
                 <div>
                     Copyright &copy; 2019-2021 <a href="http://www.apache.org">The Apache Software Foundation</a>.
+                    <br>
                     Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version
                     2.0</a>.
                     <br>