docs: correct image path and update docker build platforms

Update README image source from 'apollo' to 'ares' to reflect correct branding.
Add linux/arm64/v8 to Docker build platforms for broader ARM architecture support.

.github/workflows/docker.yml

@@ -79,7 +79,7 @@ jobs:
             org.opencontainers.image.source=${{ env.IMAGE_SOURCE }}
             org.opencontainers.image.description=${{ env.IMAGE_DESCRIPTION }}
             org.opencontainers.image.licenses=${{ env.IMAGE_LICENSE }}
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64,linux/arm64,linux/arm64/v8
 
   update_files:
     runs-on: ubuntu-latest