Bump brpaz/hadolint-action from v1.3.1 to v1.4.0

Bumps [brpaz/hadolint-action](https://github.com/brpaz/hadolint-action) from v1.3.1 to v1.4.0.
- [Release notes](https://github.com/brpaz/hadolint-action/releases)
- [Changelog](https://github.com/hadolint/hadolint-action/blob/master/.releaserc)
- [Commits](brpaz/hadolint-action@v1.3.1...473e36b)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Run hadolint
-        uses: brpaz/hadolint-action@v1.3.1
+        uses: brpaz/hadolint-action@v1.4.0
 
   markdownlint:
     name: markdown