buildx link was broken

[Veer0x1]

buildx comes by default with docker v23 and newer

What this PR does / why we need it:
BuildKit is the default Docker build engine, so both docker build and docker buildx build use BuildKit to build images. docker build is now an alias for the docker buildx build command.
BuildKit is the default builder for users on Docker Desktop and Docker Engine v23.0 and later.
https://docs.docker.com/build/buildkit/

Checklist:

• Docs included if any changes are user facing

[andreyvelich]

Thanks for your contribution @Veer0x1!
/lgtm
/approve

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andreyvelich

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [andreyvelich]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[coveralls]

Pull Request Test Coverage Report for Build 12328680364

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 12321746319:	0.0%
Covered Lines:	85
Relevant Lines:	85

---

💛 - Coveralls