Bump third_party/pigweed/repo from `1f12d06` to `c221c63` #901

Job	Run time
REPL Tests - Linux	7m 17s
Test Suites - Darwin (no-ble-asan-clang)	2m 48s
Test Suites - Darwin (no-ble-tsan-clang)	1s
Test Suites - Linux (no-ble-tsan-clang)	1m 40s
REPL Tests - Darwin	0s
	11m 46s

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