fix(activity): make emails for link share uploads true by default

Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

apps/files_sharing/lib/Activity/Settings/PublicLinksUpload.php

@@ -61,6 +61,6 @@ public function canChangeMail() {
 	 * @since 11.0.0
 	 */
 	public function isDefaultEnabledMail() {
-		return false;
+		return true;
 	}
 }