chore(deps): 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-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/pr.yaml

@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: 🔧 Build SampleAddresses
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           context: packages/sampleAddresses
 
@@ -25,7 +25,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: 🔧 Build Simulator
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           context: packages/simulator
 
@@ -36,6 +36,6 @@ jobs:
         uses: actions/checkout@v4
 
       - name: 🔧 Build Visualisation
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           context: packages/visualisation