fix: wrong choice number

[midgleyc]

Came in in the refactor. Noticed in-game, 607 is Room 237.

[codecov]

Codecov Report

Merging #780 (5937879) into main (1fc0151) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #780   +/-   ##
=========================================
  Coverage     24.55%   24.55%           
  Complexity    10906    10906           
=========================================
  Files          1016     1016           
  Lines        158863   158863           
  Branches      34991    34991           
=========================================
  Hits          39010    39010           
  Misses       112833   112833           
  Partials       7020     7020           

Impacted Files	Coverage Δ
...sourceforge/kolmafia/session/ChoiceAdventures.java	30.74% <ø> (ø)

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