Bump docker/login-action from 3.6.0 to 4.0.0 (#8705)

Bumps [docker/login-action](https://github.com/docker/login-action) from 3.6.0 to 4.0.0.
- [Release notes](https://github.com/docker/login-action/releases)
- [Commits](docker/login-action@5e57cd1...b45d80f)

---
updated-dependencies:
- dependency-name: docker/login-action
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]

.github/workflows/docker-publish.yaml

@@ -17,7 +17,7 @@ jobs:
         with:
           images: weaveworks/eksctl
       - name: Log in to Docker Hub
-        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef #v3.6.0
+        uses: docker/login-action@b45d80f862d83dbcd57f89517bcf500b2ab88fb2 #v4.0.0
         with:
           username: weaveworkseksctlci
           password: ${{ secrets.DOCKER_HUB_PASSWORD }}