build(deps): bump alpine from 3.23.3 to 3.23.4 in /cluster/images

[dependabot]

Bumps alpine from 3.23.3 to 3.23.4.

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Does this PR introduce a user-facing change?:

The base image `alpine` has been promoted from `alpine:3.23.3` to `alpine:3.23.4` to address security concerns.

[zhzhuang-zju]

/retest

[zhzhuang-zju]

remedy testing remedy.spec.decisionMatches is not empty [It] Cluster domain name resolution function encounters an exception, then remove the remedy resource [Serial]

https://github.com/karmada-io/karmada/actions/runs/24598265594/job/71932594704?pr=7410#step:6:5818

deployment replicas syncer testing when policy is Divided schedule type, propagate 1 replica but hpa minReplicas is 2 [It] propagate 1 replica but hpa minReplicas is 2

https://github.com/karmada-io/karmada/actions/runs/24598265594/job/71932594709?pr=7410#step:6:4553

[RainbowMango]

/lgtm
/approve

[karmada-bot]

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This pull-request has been approved by: RainbowMango

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