Merge pull request SharePoint#8295 from chrisda/patch-1

Update site-footer.md

Author: andrewconnell

docs/features/site-footer.md

@@ -1,7 +1,7 @@
 ---
 title: Overview of the SharePoint Site footer
 description: SharePoint Site footers can be used to show a logo or set of links/labels in a modern SharePoint site. They can be configured using the UI settings or by using APIs.
-ms.date: 06/28/2022
+ms.date: 07/14/2022
 ms.localizationpriority: high
 ---
 
@@ -15,6 +15,8 @@ Footers are a common branding / navigation control in websites and portals. Shar
 
 > [!IMPORTANT]
 > Footer will be enabled by default for all new communication sites after the feature is rolled out. Along with this update, the content bar (also referred to as the “social bar”) - which contains the Like, Comment, View and Save for Later icons - will be docked permanently on top of the Comments section on all modern pages and news posts.
+>
+> Footers don't appear in sites on mobile devices or apps.
 
 ## Sample footer