chore(deps): update docker/build-push-action action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -77,7 +77,7 @@ jobs:
           platforms: linux/amd64,linux/arm64
 
       - name: Build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64

.github/workflows/publish.yml

@@ -45,7 +45,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           platforms: linux/amd64,linux/arm64