chore(base-cluster/dependencies): update docker.io/bitnami/kubectl do…

…cker tag to v1.28.2 (#589)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/bitnami/kubectl | minor | `1.27.6` -> `1.28.2` |

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charts/base-cluster/values.yaml

@@ -57,7 +57,7 @@ global:
     image:
       registry: docker.io
       repository: bitnami/kubectl
-      tag: 1.27.6
+      tag: 1.28.2
   flux:
     image:
       registry: docker.io