build(deps): bump docker/build-push-action from 3 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 3 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v3...v6)

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

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

.github/workflows/docker-build.yml

@@ -44,7 +44,7 @@ jobs:
         echo VERSION=$(git describe --tags > /dev/null 2>&1 && git describe --tags | head -1 | sed -re "s/${VERSION_PATTERN}/\\1.\\3\\2/" | sed -re 's/\.$/.0/') >> $GITHUB_ENV
 
     - name: Build and push main image
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v6
       with:
         push: true
         tags: fossology/fossology:latest
@@ -55,7 +55,7 @@ jobs:
           org.opencontainers.image.version=${VERSION}
 
     - name: Build and push runner image
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v6
       with:
         push: true
         tags: fossology/fossology:scanner

.github/workflows/release-publish.yml

@@ -145,7 +145,7 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
     - name: Build and push main image
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v6
       with:
         push: true
         tags: fossology/fossology:${{ steps.get_release.outputs.tag_name }}
@@ -154,7 +154,7 @@ jobs:
         context: .
 
     - name: Build and push runner image
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v6
       with:
         push: true
         tags: fossology/fossology:${{ steps.get_release.outputs.tag_name }}-scanner