Update mirror.gcr.io/aquasec/trivy Docker tag to v0.68.1 (#2228)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [mirror.gcr.io/aquasec/trivy](https://www.aquasec.com/products/trivy/) ([source](https://github.com/aquasecurity/trivy)) | minor | `0.67.2` -> `0.68.1` |

---

### Release Notes

<details>
<summary>aquasecurity/trivy (mirror.gcr.io/aquasec/trivy)</summary>

### [`v0.68.1`](https://github.com/aquasecurity/trivy/blob/HEAD/CHANGELOG.md#0681-2025-12-03)

[Compare Source](https://github.com/aquasecurity/trivy/compare/v0.67.2...v0.68.1)

##### Bug Fixes

- update cosing settings for GoReleaser after bumping cosing to v3 ([#&#8203;9863](https://github.com/aquasecurity/trivy/issues/9863)) ([c7accc8](c7accc85c6))

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi41LjAiLCJ1cGRhdGVkSW5WZXIiOiI0Mi41LjAiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImltYWdlIl19-->

Reviewed-on: #2228
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/trivy/values.yaml

@@ -16,7 +16,7 @@ trivy-operator:
     image:
       registry: mirror.gcr.io
       repository: aquasec/trivy
-      tag: 0.67.2
+      tag: 0.68.1
     storageClassEnabled: true
     storageClassName: ceph-block
     storageSize: "5Gi"