Use asterisks for ncu-team-sync list items

[nschonni]

Since the remark-lint rules in https://github.com/nodejs/remark-preset-lint-node enforce this, it would be good to be consent with the inserted sections, so they don't need to be ignored in the READMEs that use the tool for syncing

[github-actions[bot]]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[nschonni]

Go away stale bot