tinyusb MSC buffer size

[chegewara]

Please increase MSC buffer size to avoid 8 times write for internal flash single sector:
https://github.com/espressif/arduino-esp32/blob/master/tools/sdk/esp32s2/sdkconfig#L204
https://github.com/espressif/esp-iot-solution/blob/usb/add_usb_solutions/examples/usb/device/usb_msc_wireless_disk/sdkconfig.defaults#L3

With 512 bytes buffer size flash will be 8 times faster wearing, so instead of 100k cycles its only 12.5k writes over USB.