Update docker/metadata-action action to v6 (#43)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/multi-build.yaml

@@ -87,7 +87,7 @@ jobs:
         # The metadata includes information such as the image name, tags, and labels.
         # The metadata will be used later in the workflow to build and push the Docker image.
         id: meta
-        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
         with:
           images: ${{ env.GHCR_IMAGE }}
 
@@ -203,7 +203,7 @@ jobs:
         # It uses the docker/metadata-action to create metadata based on the repository information.
         # The metadata includes information such as the image name, tags, and labels.
         id: meta
-        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
         with:
           images: ${{ env.GHCR_IMAGE }}
           annotations: |