Fixed typo in previous commit to Dockerfile

.gitlab-ci.yml

@@ -48,7 +48,7 @@ x86_64:build-test:
   script:
   - if [ -f init ]; then chmod 500 init; fi
   - ([ -z "$REFRESH" ] && docker pull ${CI_REGISTRY_IMAGE}:${CACHETAG}) || echo "true"
-  - docker build --file Docker.phptest --cache-from ${CI_REGISTRY_IMAGE}:${CACHETAG} -t ${CI_REGISTRY_IMAGE}:${VERSION} -t ${CI_REGISTRY_IMAGE}:${CACHETAG} .
+  - docker build --file Dockerfile.phptest --cache-from ${CI_REGISTRY_IMAGE}:${CACHETAG} -t ${CI_REGISTRY_IMAGE}:${VERSION} -t ${CI_REGISTRY_IMAGE}:${CACHETAG} .
   - docker push ${CI_REGISTRY_IMAGE}:${VERSION}-test
   tags:
   - docker