Bump docker/metadata-action from 4.5.0 to 4.6.0 (#587)

Author: dependabot[bot]

.github/workflows/build.yaml

@@ -212,7 +212,7 @@ jobs:
       # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
-        uses: docker/metadata-action@v4.5.0
+        uses: docker/metadata-action@v4.6.0
         with:
           images: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
@@ -231,7 +231,7 @@ jobs:
 
       - name: Extract Alpine Docker metadata
         id: meta-alpine
-        uses: docker/metadata-action@v4.5.0
+        uses: docker/metadata-action@v4.6.0
         with:
           flavor: |
             latest=auto