Update aws-java-sdk-core to 1.12.777 #1627

Job	Run time
publishLocal	5m 9s
mdoc	1m 52s
integrationTest ([email protected], 2.12.17)	3m 58s
lint	3m 36s
integrationTest ([email protected], 2.13.8)	3m 48s
test ([email protected], 2.12.17)	4m 2s
integrationTest ([email protected], 2.12.17)	3m 53s
test ([email protected], 2.13.8)	3m 32s
integrationTest ([email protected], 2.13.8)	3m 41s
test ([email protected], 2.12.17)	4m 0s
test ([email protected], 2.13.8)	3m 51s
publish	0s
	41m 22s

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