docs(shogi): point readers at 0-draft/shogi, where the board now lives

[kanywst]

The shogi board left the kanywst/kanywst profile README on 2026-09-02 and now lives in 0-draft/shogi. The article still told readers to play on the profile, where there is no board any more. Adds a dated update note at the top and swaps the closing link.

[coderabbitai]

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