Kubectl tool installer

Version updated for https://github.com/Azure/setup-kubectl to version v4.0.1.

• This publisher is shown as ‘verified’ by GitHub.
• This action is used across all versions by 13,860 repositories.

Go to the GitHub Marketplace to find the latest changes.

Release notes

• Remove erronious ‘v’ prefix on previous changelog for v4.0.0 that led to “vv4.0.0” tag issue
• Dependabot fixes

• Azure
• GitHub Actions