fix(deps): update dependency @google-cloud/security-center to v8.9.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@google-cloud/security-center (source)	8.8.0 -> 8.9.0

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Release Notes

googleapis/google-cloud-node (@​google-cloud/security-center)

### [`v8.9.0`](https://togithub.com/googleapis/google-cloud-node/blob/HEAD/packages/google-cloud-securitycenter/CHANGELOG.md#890-2024-06-26) ##### Features - \[securitycenter] Add toxic_combination and group_memberships fields to finding ([#​5495](https://togithub.com/googleapis/google-cloud-node/issues/5495)) ([41a96b4](https://togithub.com/googleapis/google-cloud-node/commit/41a96b4231d6b98fac2c06ea8686597789ef6b1c))

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[dpebot]

/gcbrun

[dpebot]

/gcbrun

[renovate[bot]]

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[dpebot]

/gcbrun