The weekly contributors issue does not give the command to start each new entry #1277

Where: scripts/update_weekly_issue.py (contributors_issue_body).

Current gap: For someone with no entry yet the issue says to add or update their entry, but not how; check_contributors.py --stub LOGIN now starts it and the person writing the entry has to look the command up.

Suggested approach: Add a line to the issue body for each no entry yet author with the exact python3 scripts/check_contributors.py --stub LOGIN command.

Done when: the body contains one stub command per author without an entry and none for the others, covered by a test.