Ethernet and WiFi - fix DNS for static IP #1149

Job	Run time
compile-examples (arduino:mbed:nano33ble)	7m 56s
compile-examples (arduino:mbed:envie_m7)	16m 41s
compile-examples (arduino:mbed:nanorp2040connect)	13m 0s
compile-examples (arduino:mbed:nicla_sense)	7m 32s
compile-examples (arduino:mbed:nicla_vision)	12m 50s
compile-examples (arduino:mbed:opta)	16m 42s
compile-examples (arduino:mbed:giga)	25m 51s
compile-examples (arduino:mbed:nicla_voice)	5m 43s
compile-examples (arduino:mbed:edge_control)	5m 41s
compile-examples (arduino:mbed:envie_m7:target_core=cm4, - libraries/KernelDebug - libraries/Port...	4m 26s
	1h 56m 22s

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