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Bump third_party/libwebsockets/repo from `fe9a2b8` to `992f40c` #274

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Job	Run time
Chef - Linux CI Examples	6m 34s
Chef - ESP32 CI Examples	3m 35s
Chef - NRFConnect CI Examples	8m 30s
Chef - Telink CI Examples	8m 0s
	26m 39s