[18Hiawatha] fixes typo in loan log message

[philcampeau]

Fixes #10774

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

Implementation Notes

Explanation of Change

changed `paid all off all loans' to 'has paid off all loans'

Screenshots

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