adjust iopack image url (#2269) #2345

Job	Run time
build	5m 30s
adapter-tests-gui	5m 57s
adapter-tests (16.x, ubuntu-latest)	1m 41s
adapter-tests (16.x, windows-latest)	3m 36s
adapter-tests (16.x, macos-latest)	3m 6s
adapter-tests (18.x, ubuntu-latest)	2m 1s
adapter-tests (18.x, windows-latest)	3m 27s
adapter-tests (18.x, macos-latest)	4m 23s
adapter-tests (20.x, ubuntu-latest)	1m 46s
adapter-tests (20.x, windows-latest)	2m 42s
adapter-tests (20.x, macos-latest)	2m 51s
deploy	0s
	37m 0s

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