It looks like this removed line was an 'oopsie' as the URL used in manifest-unstable.json since then has been 404'ing.
Rather than reverting this change and continuing to invoke sed... It looks like jprm lets you override the URL which is used to update the manifest file, as demonstrated in this PR.
I've tested that the changes actually work in my own repo with GH actions (As logged here), so this shouldn't break anything at least.
It looks like this removed line was an 'oopsie' as the URL used in
manifest-unstable.jsonsince then has been 404'ing.Rather than reverting this change and continuing to invoke
sed... It looks likejprmlets you override the URL which is used to update the manifest file, as demonstrated in this PR.I've tested that the changes actually work in my own repo with GH actions (As logged here), so this shouldn't break anything at least.