github: Upgrade the docker actions to the latest version

This avoids warnings about the actions targeting Node 20.

There is no easily available documentation about whether there are
any other API changes in the newer versions of these actions - in
particular the bump of build-push-action which advances by two
versions.

.github/workflows/docker.yml

@@ -44,12 +44,12 @@ jobs:
           ref: ${{inputs.ref}}
       - name: Log in to Docker Hub
         if: ${{inputs.login}}
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           username: ${{vars.DOCKER_USERNAME}}
           password: ${{secrets.DOCKER_PASSWORD}}
       - name: Build Docker images
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v7
         with:
           context: .
           push: ${{inputs.push}}
@@ -79,17 +79,17 @@ jobs:
           name_is_regexp: true
           path: toolchain
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@v4
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
       - name: Log in to Docker Hub
         if: ${{inputs.login}}
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           username: ${{vars.DOCKER_USERNAME}}
           password: ${{secrets.DOCKER_PASSWORD}}
       - name: Build Docker images
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v7
         with:
           context: .
           platforms: linux/amd64,linux/arm64

.github/workflows/test-system-clang.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Build Docker images
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v7
         with:
           context: .
           push: false