update chart version to 1.2 (#611) #1194

Job	Run time
pr-test (one-chain-custom-scripts.yaml)	3m 42s
pr-test (one-chain.yaml)	4m 5s
pr-test (one-custom-chain.yaml)	4m 40s
pr-test (multi-validator.yaml)	8m 33s
pr-test (simapp.yaml)	7m 3s
pr-test (one-chain-starship-faucet.yaml)	3m 5s
pr-test (multi-validator-starship-faucet.yaml)	3m 27s
pr-test (one-chain-cometmock.yaml)	2m 59s
pr-test (one-cosmoshub-starship-faucet.yaml)	2m 54s
	40m 28s

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