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

| datasource  | package                  | from | to |
| ----------- | ------------------------ | ---- | -- |
| github-tags | docker/build-push-action | v5   | v6 |

Author: renovate[bot]

.github/workflows/pr-docker_test.yaml

@@ -23,7 +23,7 @@ jobs:
 
       -
         name: Build Docker Test Image
-        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
+        uses: docker/build-push-action@15560696de535e4014efeff63c48f16952e52dd1 # v6
         id: build
         with:
           context: .

.github/workflows/tag-docker_test_build_push.yaml

@@ -33,7 +33,7 @@ jobs:
 
       -
         name: Build Docker Test Image
-        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
+        uses: docker/build-push-action@15560696de535e4014efeff63c48f16952e52dd1 # v6
         id: build
         with:
           context: .
@@ -116,7 +116,7 @@ jobs:
       -
         # Push other images
         name: Build and Push Docker Images
-        uses: docker/build-push-action@ca052bb54ab0790a636c9b5f226502c73d547a25 # v5
+        uses: docker/build-push-action@15560696de535e4014efeff63c48f16952e52dd1 # v6
         id: build-all
         with:
           context: .