Fix typo in Card Deck documentation

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Test Results

  1 files    1 suites   0s :stopwatch: 278 tests 275 :white_check_mark: 0 :zzz: 0 :x: 3 :fire: 278 runs  272 :white_check_mark: 0 :zzz: 3 :x: 3 :fire:

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Results for commit fa4c4be1.

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