build: temporarily ignore renovate updates for @angular/build-tooling #251

Job	Run time
list	39s
workflow (build-cli)	40s
workflow (modules-builder-tests)	38s
workflow (devkit-core-tests)	44s
workflow (devkit-core-tests-rerun)	37s
workflow (build-unit-tests)	37s
	3m 55s

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