Bump espressif32 to 6.8.1

Author: github-actions[bot]

platformio.ini

@@ -168,7 +168,7 @@ gfx_display_build_flags =
 #platform = https://github.com/platformio/platform-espressif32.git#feature/stage
 #platform = https://github.com/platformio/platform-espressif32.git#develop
 #platform = [email protected]
-platform = espressif32@6.7.0
+platform = espressif32@6.8.1
 #framework = arduino, espidf
 framework = arduino
 lib_deps = ${common.lib_deps}