Bump hadolint/hadolint-action from 1.5.0 to 1.6.0

Bumps [hadolint/hadolint-action](https://github.com/hadolint/hadolint-action) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/hadolint/hadolint-action/releases)
- [Changelog](https://github.com/hadolint/hadolint-action/blob/master/.releaserc)
- [Commits](hadolint/hadolint-action@v1.5.0...v1.6.0)

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

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

Author: dependabot[bot]

.github/workflows/docker.lint.yml

@@ -13,6 +13,6 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v2.3.4
     - name: lint
-      uses: hadolint/hadolint-action@v1.5.0
+      uses: hadolint/hadolint-action@v1.6.0
       with:
         dockerfile: Dockerfile