Fix `prefetch_custom_texlive` command (#23813)

Previous attempt failed with `sh: gcr.io/overleaf-ops/texlive-full:2023.1: No such file or directory`.

✅ Now tested with `make prefetch_custom_texlive`

GitOrigin-RevId: 09a5e1d3c270bdb58c761c8be3c665155879290f

server-ce/test/Makefile

@@ -44,9 +44,8 @@ prefetch_custom_compose_pull:
 
 prefetch_custom: prefetch_custom_texlive
 prefetch_custom_texlive:
-	echo -n "$$ALL_TEX_LIVE_DOCKER_IMAGES" | tr ',' '\0' | xargs -0 -I% \
-  sh -exc 'tag=%; re_tag=quay.io/sharelatex/$${tag#*/*/}; docker pull $$tag; docker tag $$tag $$re_tag'
-
+	echo "$$ALL_TEX_LIVE_DOCKER_IMAGES" | tr ',' '\n' | xargs -I% \
+	sh -exc 'tag=%; re_tag=quay.io/sharelatex/$${tag#*/*/}; docker pull $$tag; docker tag $$tag $$re_tag'
 
 prefetch_custom: prefetch_old
 prefetch_old: