Revert flash mode from DIO to QIO for TinyPICO

Fixed regression caused by platformio#584

Author: valeros

boards/tinypico.json

@@ -7,7 +7,7 @@
     "extra_flags": "-DARDUINO_TINYPICO -DBOARD_HAS_PSRAM -mfix-esp32-psram-cache-issue",
     "f_cpu": "240000000L",
     "f_flash": "40000000L",
-    "flash_mode": "dio",
+    "flash_mode": "qio",
     "mcu": "esp32",
     "variant": "pico32"
   },