⬆️ Bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

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

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

.github/workflows/build.yml

@@ -176,7 +176,7 @@ jobs:
 
       - name: Build Docker image
         id: image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           # push and load may not be set together at the moment
           #
@@ -291,7 +291,7 @@ jobs:
 
       - name: Build Docker image
         id: image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push:       true
           load:       false
@@ -389,7 +389,7 @@ jobs:
 
       - name: Build Docker image
         id: image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push:       true
           load:       false
@@ -503,7 +503,7 @@ jobs:
 
       - name: Build Docker image
         id: image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push:       true
           load:       false

.github/workflows/doc-build-pdf.yml

@@ -84,7 +84,7 @@ jobs:
 
       - name: Build Docker image
         id: image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           # push and load may not be set together at the moment
           push:       true

.github/workflows/doc-build.yml

@@ -88,7 +88,7 @@ jobs:
 
       - name: Build Docker image
         id: image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           # push and load may not be set together at the moment
           push:       true

.github/workflows/docker_hub.yml

@@ -82,7 +82,7 @@ jobs:
         if: env.JOB_DONE == 'false' && env.CAN_LOGIN == 'true'
 
       - name: Build and push make-build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: docker/Dockerfile