Change flash size to 8MB

This enables flash memory for building Bluetooth Proxy (requires by #9), however, there are two downsides:
- The system is crashing when BLE is enabled and requires more investigation.
- User's cannot change flash size via OTA, so a serial flash will be required.

TX-Ultimate-Easy-ESPHome.yaml

@@ -10,6 +10,10 @@ packages:
   remote_package:
     url: https://github.com/edwardtfn/TX-Ultimate-Easy
     ref: dev
-    refresh: 30s
+    refresh: 1h
     files:
       - ESPHome/TX-Ultimate-Easy-ESPHome_core.yaml
+
+### Uncomment the lines bellow if you have issues with OTA and cannot flash via serial at this moment. ###
+#esp32:
+#  flash_size: 4MB