[NIFI-6620] Doc for sidenav in webapp updated

This closes #55

Signed-off-by: Scott Aslan <scottyaslan@gmail.com>
diff --git a/webapp/components/flow-design-system/fds-demo.html b/webapp/components/flow-design-system/fds-demo.html
index 11e1220..37e82df 100644
--- a/webapp/components/flow-design-system/fds-demo.html
+++ b/webapp/components/flow-design-system/fds-demo.html
@@ -3093,7 +3093,7 @@
                 <pre lang="html">
         <![CDATA[
         <!-- Basic Usage -->
-        <mat-sidenav #sidenav mode="over" align="end" opened="false">
+        <mat-sidenav #sidenav mode="over" position="end" opened="false">
             ...
         </mat-sidenav>
         ]]>