build: update rules_angular digest to 5b9b1fc #1159

Job	Run time
list	28s
workflow (build-cli)	1m 28s
workflow (devkit-core-tests)	1m 17s
workflow (modules-builder-tests)	1m 42s
workflow (devkit-core-tests-rerun)	1m 16s
workflow (build-unit-tests)	2m 9s
	8m 20s

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