chore: fix release-please to use correct sonatype credentials #109

Job	Run time
test-platforms-and-versions (ubuntu-latest, 11)	2m 35s
test-platforms-and-versions (ubuntu-latest, 8)	2m 38s
test-packaging	3m 17s
test-contract-tests	2m 55s
test-platforms-and-versions (ubuntu-latest, 17)	2m 25s
test-platforms-and-versions (ubuntu-latest, 19)	2m 36s
	16m 26s

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