ci: Bump minikube version to work with newer K8s version

[terrytangyuan]

This warning is on CI builds due to unsupported combination between Minikube and K8s versions and CI sometimes has issue to set up minikube + K8s. Example: https://github.com/kserve/kserve/actions/runs/8145181761/job/22261191715?pr=3443

/home/runner/bin/minikube start --cni calico --driver none --kubernetes-version v1.27.4 --network-plugin cni --wait all --wait-timeout=6m0s
* minikube v1.31.1 on Ubuntu 22.04
! Specified Kubernetes version 1.27.4 is newer than the newest supported version: v1.27.3. Use `minikube config defaults kubernetes-version` for details.

Upgrading minikube could potentially help alleviate this issue from happening frequently.

[sivanantha321]

/lgtm

[yuzisun]

/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: sivanantha321, terrytangyuan, yuzisun

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