fix(container): update image registry.k8s.io/kubectl to v1.29.3 (#1372)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

bootstrap/templates/kubernetes/apps/system-upgrade/system-upgrade-controller/app/helmrelease.yaml.j2

@@ -35,7 +35,7 @@ spec:
               SYSTEM_UPGRADE_JOB_ACTIVE_DEADLINE_SECONDS: 900
               SYSTEM_UPGRADE_JOB_BACKOFF_LIMIT: 99
               SYSTEM_UPGRADE_JOB_IMAGE_PULL_POLICY: IfNotPresent
-              SYSTEM_UPGRADE_JOB_KUBECTL_IMAGE: registry.k8s.io/kubectl:v1.29.2
+              SYSTEM_UPGRADE_JOB_KUBECTL_IMAGE: registry.k8s.io/kubectl:v1.29.3
               SYSTEM_UPGRADE_JOB_PRIVILEGED: true
               SYSTEM_UPGRADE_JOB_TTL_SECONDS_AFTER_FINISH: 900
               SYSTEM_UPGRADE_PLAN_POLLING_INTERVAL: 15m