Update default flash frequency for heltec_wireless_stick_lite (#1480)

Author: Andreas-Pedersen

boards/heltec_wireless_stick_lite.json

@@ -6,7 +6,7 @@
     "core": "esp32",
     "extra_flags": "-DARDUINO_HELTEC_WIRELESS_STICK_LITE",
     "f_cpu": "240000000L",
-    "f_flash": "40000000L",
+    "f_flash": "80000000L",
     "flash_mode": "dio",
     "mcu": "esp32",
     "variant": "heltec_wireless_stick_lite"