Fix setup-pandoc test on arm64 Linux

[gaborcsardi]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.61%. Comparing base (c4612eb) to head (959affb).
Report is 1 commits behind head on v2-branch.

Additional details and impacted files

@@            Coverage Diff             @@
##           v2-branch     #976   +/-   ##
==========================================
  Coverage      84.61%   84.61%           
==========================================
  Files              3        3           
  Lines             13       13           
==========================================
  Hits              11       11           
  Misses             2        2           

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[gaborcsardi]

@jeroen Can you please take a look at this? Thanks!

[gaborcsardi]

Tested here: https://github.com/r-lib/actions/actions/runs/13408938877/job/37454443558?pr=976

[gaborcsardi]

Thanks!