Update Helm release k8up to v4.8.3

This MR contains the following updates:

Package	Update	Change
k8up (source)	patch	4.8.1 -> 4.8.3

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Release Notes

k8up-io/k8up (k8up)

v4.8.3

Compare Source

This release contains only Helm chart changes

1 changes since k8up-4.8.2

🐛 Fixes

• Bump k8up version (#​1034)

v4.8.2

Compare Source

This release contains only Helm chart changes

1 changes since k8up-4.8.1

🐛 Fixes

• Bump K8up version (#​1029)

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