Bump docker/build-push-action from 4 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 4 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v4...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -199,7 +199,7 @@ jobs:
           type=raw,value=latest,enable={{is_default_branch}}
     
     - name: Build and push orchestrator
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: ./Dockerfile.orchestrator
@@ -210,7 +210,7 @@ jobs:
         cache-to: type=gha,mode=max
 
     - name: Build and push node
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: ./Dockerfile.node

.github/workflows/neural-nexus-ci-cd.yml

@@ -199,7 +199,7 @@ jobs:
           type=raw,value=latest,enable={{is_default_branch}}
     
     - name: Build and push orchestrator
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: ./Dockerfile.orchestrator
@@ -210,7 +210,7 @@ jobs:
         cache-to: type=gha,mode=max
 
     - name: Build and push node
-      uses: docker/build-push-action@v4
+      uses: docker/build-push-action@v6
       with:
         context: .
         file: ./Dockerfile.node