Update copyright headers

tools/test_apps/system/flash_psram/app_test.py

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+# SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Apache-2.0