chore(deps): update velero kubectl image to v1.31.0 (#669)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [docker.io/bitnami/kubectl](https://togithub.com/bitnami/containers)
([source](https://togithub.com/bitnami/containers/tree/HEAD/bitnami/kubectl))
| minor | `1.30.3` -> `1.31.0` |

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src/velero/values/upstream-values.yaml

@@ -5,7 +5,7 @@ image:
 kubectl:
   image:
     repository: docker.io/bitnami/kubectl
-    tag: 1.30.3
+    tag: 1.31.0
 
 initContainers:
   - name: velero-plugin-for-aws

src/velero/zarf.yaml

@@ -18,7 +18,7 @@ components:
     images:
       - velero/velero:v1.14.0
       - velero/velero-plugin-for-aws:v1.10.0
-      - docker.io/bitnami/kubectl:1.30.3
+      - docker.io/bitnami/kubectl:1.31.0
 
   - name: velero
     required: true