Bump dotnet/sdk from 6.0.427-1-bookworm-slim to 9.0.100-bookworm-slim #802

Job	Run time
generate-version	7s
build-helm-chart	13s
build-manifests	6s
build-image	1m 7s
test-manifests (manifests, 1.30)	11s
test-manifests (manifests, 1.29)	19s
test-manifests (manifests, 1.28)	10s
test-manifests (manifests, 1.27)	29s
test-manifests (manifests, 1.26)	18s
test-manifests (helm-manifests, 1.30)	10s
test-manifests (helm-manifests, 1.29)	10s
test-manifests (helm-manifests, 1.28)	17s
test-manifests (helm-manifests, 1.27)	10s
test-manifests (helm-manifests, 1.26)	10s
test-image	0s
release-internal	0s
release-public	0s
	3m 57s

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