Update registry1.dso.mil/ironbank/opensource/kubernetes/kubectl Docker tag to v1.30.5

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/opensource/kubernetes/kubectl (source)	minor	v1.29.9 -> v1.30.5

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• Followed upgrade instructions outlined in docs/DEVELOPMENT_MAINTENANCE.md
• Update Docs with new/updated steps as needed
• Tested and Validated Changes made with supporting info like logs or screenshots from test pipelines

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chart/Chart.yaml

@@ -40,7 +40,7 @@ annotations:
     - name: velero
       image: registry1.dso.mil/ironbank/opensource/velero/velero:v1.14.1
     - name: kubectl
-      image: registry1.dso.mil/ironbank/opensource/kubernetes/kubectl:v1.29.9
+      image: registry1.dso.mil/ironbank/opensource/kubernetes/kubectl:v1.30.5
     - name: velero-tester
       condition: bbtests.enabled
       image: registry1.dso.mil/bigbang-ci/velero-tester:1.1.0