build(deps): bump github.com/vbatts/git-validation in /test/tools

Bumps [github.com/vbatts/git-validation](https://github.com/vbatts/git-validation) from 1.1.0 to 1.2.0.
- [Release notes](https://github.com/vbatts/git-validation/releases)
- [Commits](https://github.com/vbatts/git-validation/compare/v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: github.com/vbatts/git-validation
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

test/tools/vendor/github.com/vbatts/git-validation/main.go

@@ -22,6 +22,7 @@ var (
 	flDebug        = flag.Bool("D", false, "debug output")
 	flQuiet        = flag.Bool("q", false, "less output")
 	flDir          = flag.String("d", ".", "git directory to validate from")
+	flNoGithub     = flag.Bool("no-github", false, "disables Github Actions environment checks (when env GITHUB_ACTIONS=true is set)")
 	flNoTravis     = flag.Bool("no-travis", false, "disables travis environment checks (when env TRAVIS=true is set)")
 	flTravisPROnly = flag.Bool("travis-pr-only", true, "when on travis, only run validations if the CI-Build is checking pull-request build")
 )
@@ -73,6 +74,10 @@ func main() {
 				commitRange = os.Getenv("TRAVIS_COMMIT")
 			}
 		}
+		// https://docs.github.com/en/actions/reference/environment-variables
+		if strings.ToLower(os.Getenv("GITHUB_ACTIONS")) == "true" && !*flNoGithub {
+			commitRange = fmt.Sprintf("%s..%s", os.Getenv("GITHUB_SHA"), "HEAD")
+		}
 	}
 
 	runner, err := validate.NewRunner(*flDir, rules, commitRange, *flVerbose)