change kubectl download site

[YoninL]

Change kubectl download site from https://storage.googleapis.com/kubernetes-release/release to https://dl.k8s.io

Description

Change kubectl download site from https://storage.googleapis.com/kubernetes-release/release to https://dl.k8s.io

Motivation and Context

• I have raised an issue to propose this change, which has been given a label of design/approved by a maintainer (required)
  According to Deprecate and migrate away from gs://kubernetes-release kubernetes/k8s.io#2396, we should migrate from gs bucket to dl.k8s.io.
  Also refer to how minikube is making the change, https://github.com/kubernetes/minikube/pull/15840/files

How Has This Been Tested?

get_test.go is updated.

If updating or adding a new CLI to arkade get, run:

go build && ./hack/test-tool.sh TOOL_NAME

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Documentation

• I have updated the list of tools in README.md if (required) with ./arkade get --format markdown
• I have updated the list of apps in README.md if (required) with ./arkade install --help

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have signed-off my commits with git commit -s

• I have tested this on arm, or have added code to prevent deployment

[Jasstkn]

LGTM.

[YoninL]

@Jasstkn Thank you, can you help to merge this PR? I don't have write permission, thanks.

[alexellis]

Approved

[alexellis]

@Jasstkn I'm assuming you've tested this and that's why you approved the PR. I'm merging it, but I haven't tested it or verified it in any way.

Hope you're OK with sending a PR to revert this if there's an issue and breakage for users?

[alexellis]

@YoninL has also provided no evidence of testing, he changed this in the UI as you can see from "patch-1"

[alexellis]

@Jasstkn I merged this and did a release, it broke the build and we have a faulty publish:

https://github.com/alexellis/arkade/actions/runs/8029701263/job/21936281148

[YoninL]

Thanks for fixing the issue, yes, was updating in the UI, sorry I missed some links.