Update wired-ethernet.md

Author: glynhudson

docs/wired-ethernet.md

@@ -52,7 +52,7 @@ esptool.py --baud 921600 --before default_reset --after hard_reset write_flash -
 Subsequent upgrades:
 
 ```bash
-esptool.py --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 0x10000  openevse_esp32-gateway-e.bin
+esptool.py --baud 921600 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 openevse_esp32-gateway-e.bin
 ```
 
 ### For rev F/G