Update SeaportRouter.sol for 1.6

[ryanio]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.67%. Comparing base (00423f3) to head (36175c8).
Report is 2 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1309   +/-   ##
=======================================
  Coverage   97.67%   97.67%           
=======================================
  Files          22       22           
  Lines        1379     1379           
  Branches      248      248           
=======================================
  Hits         1347     1347           
  Misses         25       25           
  Partials        7        7           

Flag	Coverage Δ
foundry	73.03% <ø> (ø)
reference	97.26% <ø> (ø)

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