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Bump third_party/pigweed/repo from `e765c4d` to `696953b` #899

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Run time

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Job	Run time
Chef - ESP32 CI Examples	12m 59s
Chef - Linux CI Examples	8m 51s
Chef - NRFConnect CI Examples	12m 26s
Chef - Telink CI Examples	10m 42s
	44m 58s