chore: Adapt syntax for PHP<8

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

lib/private/User/Session.php

@@ -444,7 +444,7 @@ public function logClientIn($user,
 				// Refuse session tokens here, only app tokens are handled
 				return false;
 			}
-		} catch (ExpiredTokenException) {
+		} catch (ExpiredTokenException $e) {
 			// Just return on an expired token no need to check further or record a failed login
 			return false;
 		}