Ensure we hit the right metadata job for naev-artwork.

Author: ProjectSynchro

.github/workflows/docker_build.yml

@@ -46,7 +46,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Generate image metadata
         id: docker_meta
-        if: ${{ matrix.arch != 'aarch64' }}
+        if: ${{ matrix.arch != 'aarch64' || matrix.imagename == 'naev-artwork' }}
         uses: crazy-max/ghaction-docker-meta@v3
         with:
           images: ghcr.io/naev/${{ matrix.imagename }}