Bump api-go version to fix Payload marshaling (#1308) #1170

Job	Run time
build-and-test (ubuntu-latest, 1.20)	12m 44s
build-and-test (ubuntu-latest, 1.21)	19m 37s
cloud-test (1.20)	1m 2s
build-and-test (macos-latest, 1.20)	15m 59s
cloud-test (1.21)	58s
build-and-test (macos-latest, 1.21)	16m 39s
build-and-test (windows-latest, 1.20)	18m 17s
build-and-test (windows-latest, 1.21)	16m 39s
features-test / test	1m 28s
	1h 43m 23s

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