Bump compat bound for RecursiveArrayTools.jl

[jlchan]

v3.31.1 has SciML/RecursiveArrayTools.jl#426 and SciML/RecursiveArrayTools.jl#425 implemented to fix SciML/OrdinaryDiffEq.jl#2625 (comment).

I'm opening this PR to check if this breaks any CI with StructArray-based DGMulti solvers.

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.89%. Comparing base (6f6aeff) to head (9b7e3c0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2306   +/-   ##
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  Coverage   96.89%   96.89%           
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  Files         495      495           
  Lines       40499    40499           
=======================================
  Hits        39239    39239           
  Misses       1260     1260           

Flag	Coverage Δ
unittests	96.89% <ø> (ø)

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[huiyuxie]

LGTM please approve @ranocha