Fix jlink image warnings #862

Job	Run time
copyright	3m 20s
checkstyle	3m 31s
shellcheck	3m 8s
build	5m 9s
cli/linux-amd64	4m 41s
spotbugs	5m 39s
vscode-ext	4m 2s
cli/darwin-amd64	5m 18s
cli/windows-amd64	6m 5s
javadoc	4m 9s
tests/cli-functional-linux	5m 9s
tests/archetype-linux	5m 8s
tests/others-linux	5m 11s
tests/cli-functional-windows	5m 12s
tests/others-windows	5m 17s
tests/cli-linux	4m 3s
tests/linker-linux	4m 51s
tests/cli-windows	4m 52s
tests/archetype-windows	5m 17s
tests/linker-windows	5m 6s
cli/binaries	5s
tests/results	-1s
gate	-1s
	1h 35m 11s

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