gateway: bump hadolint/hadolint-action from 2.1.0 to 3.1.0

Bumps [hadolint/hadolint-action](https://github.com/hadolint/hadolint-action) from 2.1.0 to 3.1.0.
- [Release notes](https://github.com/hadolint/hadolint-action/releases)
- [Changelog](https://github.com/hadolint/hadolint-action/blob/master/.releaserc)
- [Commits](hadolint/hadolint-action@f988afe...54c9adb)

---
updated-dependencies:
- dependency-name: hadolint/hadolint-action
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -39,7 +39,7 @@ jobs:
       - uses: google-github-actions/setup-gcloud@77e7a554d41e2ee56fc945c52dfd3f33d12def9a
       - uses: graalvm/setup-graalvm@01ed653ac833fe80569f1ef9f25585ba2811baab  # v1
       - uses: gradle/wrapper-validation-action@f9c9c575b8b21b6485636a91ffecd10e558c62f6  # v3.5.0
-      - uses: hadolint/hadolint-action@f988afea3da57ee48710a9795b6bb677cc901183  # v2.1.0
+      - uses: hadolint/hadolint-action@54c9adbab1582c2ef04b2016b760714a4bfde3cf  # v3.1.0
       - uses: hashicorp/setup-terraform@b9cd54a3c349d3f38e8881555d616ced269862dd  # v3
       - uses: helm/chart-releaser-action@fc23f249f75decd5edf254c6b4401532cef093c3  # v1.4.0
       - uses: helm/chart-testing-action@0d28d3144d3a25ea2cc349d6e59901c4ff469b3b  # v2.7.0