ci: fix project checks

[thaJeztah]

The github.com/kunalkushwaha/ltag project moved to the containerd org; currently it's failing;

  github.com/vbatts/git-validation
  go: downloading github.com/kunalkushwaha/ltag v0.3.0
  go: github.com/kunalkushwaha/ltag@latest: version constraints conflict:
  	github.com/kunalkushwaha/ltag@v0.3.0: parsing go.mod:
  	module declares its path as: github.com/containerd/ltag
  	        but was required as: github.com/kunalkushwaha/ltag
  Error: Process completed with exit code 1.

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Please check the following list:

• Does the affected code have corresponding tests, e.g. unit test, E2E test?
• Does this change require a documentation update?
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have an appropriate license header?

[thaJeztah]

@BigVan @AkihiroSuda PTAL

[BigVan]

thanks~