Bump compat for OrdinaryDiffEqLowStorageRK and Trixi

[benegee]

Also use Trixi.Threaded(), xref: trixi-framework/Trixi.jl#3003

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.11%. Comparing base (cbdf3b0) to head (2f2c33e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #295   +/-   ##
=======================================
  Coverage   96.11%   96.11%           
=======================================
  Files          25       25           
  Lines        1260     1260           
  Branches       74       74           
=======================================
  Hits         1211     1211           
  Misses         45       45           
  Partials        4        4           

Flag	Coverage Δ
unittests	96.11% <ø> (ø)

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