ci: fix docker tagging when pushing to main

.gitlab-ci.yml

@@ -31,7 +31,7 @@ stages:
   - docker build --pull --cache-from $CI_REGISTRY_IMAGE:latest --tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH . --file Dockerfile.ci
   - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH
   - docker rmi $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH
-  - if [ "$CI_COMMIT_BRANCH" = "main" ]; then docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA $CI_REGISTRY_IMAGE:latest && docker push $CI_REGISTRY_IMAGE:latest; fi
+  - if [ "$CI_COMMIT_BRANCH" = "main" ]; then docker tag $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA-$DOCKER_ARCH $CI_REGISTRY_IMAGE:latest && docker push $CI_REGISTRY_IMAGE:latest; fi
 
 build amd64:
   <<: *build