chore(deps): update velero to v6.6.0 (#456)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [velero](https://togithub.com/vmware-tanzu/velero)
([source](https://togithub.com/vmware-tanzu/helm-charts)) | minor |
`6.5.0` -> `6.6.0` |

---

### Release Notes

<details>
<summary>vmware-tanzu/helm-charts (velero)</summary>

###
[`v6.6.0`](https://togithub.com/vmware-tanzu/helm-charts/releases/tag/velero-6.6.0)

[Compare
Source](https://togithub.com/vmware-tanzu/helm-charts/compare/velero-6.5.0...velero-6.6.0)

A Helm chart for velero

</details>

---

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are satisfied.

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rebase/retry checkbox.

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---

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src/velero/common/zarf.yaml

@@ -37,7 +37,7 @@ components:
       - name: velero
         namespace: velero
         url: https://vmware-tanzu.github.io/helm-charts
-        version: 6.5.0
+        version: 6.6.0
         repoName: velero
         releaseName: velero
         valuesFiles: