CompatHelper: bump compat for OrdinaryDiffEqCore to 4 for package test, (keep existing compat)#2950

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compathelper/new_version/2026-04-23-00-18-37-042-01886852763trixi-framework/Trixi.jl:compathelper/new_version/2026-04-23-00-18-37-042-01886852763Copy head branch name to clipboard