Update d1_mini board url (#316) #112

Job	Run time
build (ubuntu-latest, examples/arduino-asyncudp)	1m 41s
build (ubuntu-latest, examples/arduino-blink)	2m 22s
build (ubuntu-latest, examples/arduino-webserver)	1m 39s
build (ubuntu-latest, examples/arduino-wifiscan)	1m 29s
build (ubuntu-latest, examples/esp8266-nonos-sdk-blink)	36s
build (ubuntu-latest, examples/esp8266-rtos-sdk-blink)	36s
build (windows-latest, examples/arduino-asyncudp)	2m 45s
build (windows-latest, examples/arduino-blink)	3m 33s
build (windows-latest, examples/arduino-webserver)	2m 50s
build (windows-latest, examples/arduino-wifiscan)	2m 34s
build (windows-latest, examples/esp8266-nonos-sdk-blink)	1m 22s
build (windows-latest, examples/esp8266-rtos-sdk-blink)	1m 28s
build (macos-latest, examples/arduino-asyncudp)	1m 44s
build (macos-latest, examples/arduino-blink)	4m 33s
build (macos-latest, examples/arduino-webserver)	2m 2s
build (macos-latest, examples/arduino-wifiscan)	1m 59s
build (macos-latest, examples/esp8266-nonos-sdk-blink)	52s
build (macos-latest, examples/esp8266-rtos-sdk-blink)	46s
	34m 51s

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