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

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

Author: renovate[bot]

.github/workflows/build.yml

@@ -35,7 +35,7 @@ jobs:
         username: ${{ github.repository_owner }}
         password: ${{ secrets.GITHUB_TOKEN }}
 
-    - uses: docker/metadata-action@v5
+    - uses: docker/metadata-action@v6
       id: meta
       with:
         images: ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ env.IMAGE_NAME }}