build(deps): 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/tiiuae-builder-images.yaml

@@ -33,7 +33,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Build builder base image and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./px4-firmware/packaging/Dockerfile.build_env_pre

.github/workflows/tiiuae-pixhawk-and-saluki.yaml

@@ -251,7 +251,7 @@ jobs:
           check-jsonschema --schemafile px4-firmware/Tools/saluki_packaging/saluki_file_info-schema.json saluki_file_info.json
 
       - name: Firmware flasher - Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           context: .
@@ -403,7 +403,7 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Firmware flasher - Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: true
           context: .

.github/workflows/tiiuae-sitl-gzsim.yaml

@@ -53,7 +53,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build tii-px4-sitl-gzsim image and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./px4-firmware/packaging/Dockerfile.sitl_gzsim

.github/workflows/tiiuae-sitl.yaml

@@ -63,7 +63,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build tii-px4-sitl image and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./px4-firmware/packaging/Dockerfile.sitl