Update psalm baseline

Signed-off-by: GitHub <noreply@github.com>

Author: nextcloud-command

build/psalm-baseline.xml

@@ -757,15 +757,9 @@
     </UndefinedInterfaceMethod>
   </file>
   <file src="apps/dav/lib/Controller/InvitationResponseController.php">
-    <InvalidScalarArgument occurrences="1">
-      <code>$guests</code>
-    </InvalidScalarArgument>
     <UndefinedPropertyAssignment occurrences="1">
       <code>$vEvent-&gt;DTSTAMP</code>
     </UndefinedPropertyAssignment>
-    <UndefinedPropertyFetch occurrences="1">
-      <code>$vEvent-&gt;{'ATTENDEE'}</code>
-    </UndefinedPropertyFetch>
   </file>
   <file src="apps/dav/lib/DAV/CustomPropertiesBackend.php">
     <InvalidArgument occurrences="1">