Merge pull request #27208 from nextcloud/backport/27199/stable21

[stable21] Use noreply@ as email address for share emails

lib/private/Share20/Manager.php

@@ -911,7 +911,7 @@ class Manager implements IManager {
 				$instanceName
 			]
 		);
-		$message->setFrom([\OCP\Util::getDefaultEmailAddress($instanceName) => $senderName]);
+		$message->setFrom([\OCP\Util::getDefaultEmailAddress('noreply') => $senderName]);
 
 		// The "Reply-To" is set to the sharer if an mail address is configured
 		// also the default footer contains a "Do not reply" which needs to be adjusted.