[1822CA ERS] Winnipeg should be pass-through, not terminal

[philcampeau]

Fixes #11329

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• [x] Branch is derived from the latest master
• [x] Add the pins or archive_alpha_games label if this change will break existing games
• [x] Code passes linter with docker compose exec rack rubocop -a
• [x] Tests pass cleanly with docker compose exec rack rake

Implementation Notes

Explanation of Change

Makes hex T14 on the 1822CA-ERS map a non-terminal city. Confirmed by both Scott Petersen on the issue report comments, and the designer over discord.

Screenshots

Any Assumptions / Hacks