Add dependabot group for vitest #106

Job	Run time
Build tests	2m 42s
Build tests	2m 42s
E2E tests (k8s-oldest, read-only)	5m 4s
E2E tests (k8s-oldest, read-only)	5m 4s
E2E tests (k8s-oldest, read-write)	7m 43s
E2E tests (k8s-oldest, read-write)	7m 43s
Unit tests	2m 47s
Unit tests	2m 47s
E2E tests (k8s-plus-one, read-only)	5m 15s
E2E tests (k8s-plus-one, read-only)	5m 2s
E2E tests (k8s-plus-one, read-write)	7m 45s
E2E tests (k8s-plus-one, read-write)	7m 45s
	1h 2m 19s

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