[package-update] request to update flux-core

[github-actions]

This is a request for an automated package update. You can click the link below to open an issue on spack and request the update.

• Click here to request the update

You can close this issue once you've clicked and opened the one above!

[vsoch]

Ok cool - this confirms that the updated will now close previous equivalent issues. It will remind us like this as long as the package file here differs from upstream spack.