Update flash settings for color kit

Author: marcelstoer

docs/guides/wifi-color-display-kit.md

@@ -98,7 +98,9 @@ allow="autoplay; encrypted-media" allowfullscreen></iframe>
 #### Select flash mode and flash size
 The WeMos D1 mini module included in this kit has an embedded 4MB SPI flash memory. 3MB of that will be reserved to host a [SPIFFS file system](https://github.com/pellepl/spiffs). If you select the correct board in the IDE the flash mode and flash size settings should get auto-configured. Verify the settings are as follows:
 
-- in ==Tools== > ==Flash Size== select "4M (3M SPIFFS)"
+- in ==Tools== > ==Flash Size== select "4MB (FS:3MB OTA:~512KB)"
+
+In older versions of the ESP8266 toolchain (ESP8266 Arduino Core) this was "4M (3M SPIFFS)" or similar.
 
 The application might fail to transfer or fail to start if the flash options are not configured properly. Make sure the menu under ==Tools== looks like this: