Update ci/docker/asmjs-unknown-emscripten/Dockerfile

Author: JohnTitor

ci/docker/asmjs-unknown-emscripten/Dockerfile

@@ -5,8 +5,8 @@ ENV DEBIAN_FRONTEND=noninteractive
 ENV TZ=America/New_York
 
 RUN apt-get update
-RUN apt-get install -y --no-install-recommends tzdata \
-    apt-get install -y --no-install-recommends \
+RUN apt-get install -y --no-install-recommends tzdata
+RUN apt-get install -y --no-install-recommends \
     ca-certificates \
     curl \
     gcc \