CompatHelper: bump compat for OrdinaryDiffEqRosenbrock to 2 for package test, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the OrdinaryDiffEqRosenbrock package from 1.9 to 1.9, 2 for package test.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[github-actions]

Benchmark Results (Julia v1.10)

Time benchmarks

	main	8e9af32...	main / 8e9af32...
bbm_1d/bbm_1d_basic.jl - rhs!:	12.9 ± 1.1 μs	12.7 ± 1.1 μs	1.02 ± 0.12
bbm_1d/bbm_1d_fourier.jl - rhs!:	0.243 ± 0.0072 ms	0.247 ± 0.0072 ms	0.985 ± 0.041
bbm_bbm_1d/bbm_bbm_1d_basic_reflecting.jl - rhs!:	0.0835 ± 0.0062 ms	0.0847 ± 0.0066 ms	0.987 ± 0.11
bbm_bbm_1d/bbm_bbm_1d_dg.jl - rhs!:	0.0323 ± 0.0015 ms	0.0323 ± 0.0017 ms	1 ± 0.07
bbm_bbm_1d/bbm_bbm_1d_relaxation.jl - rhs!:	24.8 ± 2.3 μs	25.2 ± 2.5 μs	0.985 ± 0.14
bbm_bbm_1d/bbm_bbm_1d_upwind_relaxation.jl - rhs!:	0.0325 ± 0.0027 ms	0.0325 ± 0.0021 ms	1 ± 0.1
hyperbolic_serre_green_naghdi_1d/hyperbolic_serre_green_naghdi_dingemans.jl - rhs!:	5.66 ± 0.56 μs	5.82 ± 0.22 μs	0.974 ± 0.1
kdv_1d/kdv_1d_basic.jl - rhs!:	2.18 ± 0.15 μs	1.8 ± 0.11 μs	1.21 ± 0.11
kdv_1d/kdv_1d_implicit.jl - rhs!:	1.58 ± 0.14 μs	2.2 ± 0.097 μs	0.717 ± 0.072
serre_green_naghdi_1d/serre_green_naghdi_well_balanced.jl - rhs!:	0.203 ± 0.018 ms	0.208 ± 0.017 ms	0.972 ± 0.12
svaerd_kalisch_1d/svaerd_kalisch_1d_dingemans_relaxation.jl - rhs!:	0.153 ± 0.011 ms	0.156 ± 0.012 ms	0.985 ± 0.11
time_to_load	2.28 ± 0.024 s	2.28 ± 0.0082 s	0.998 ± 0.011

Memory benchmarks

	main	8e9af32...	main / 8e9af32...
bbm_1d/bbm_1d_basic.jl - rhs!:	1 allocs: 4.12 kB	1 allocs: 4.12 kB	1
bbm_1d/bbm_1d_fourier.jl - rhs!:	1 allocs: 4.12 kB	1 allocs: 4.12 kB	1
bbm_bbm_1d/bbm_bbm_1d_basic_reflecting.jl - rhs!:	5 allocs: 1.17 kB	5 allocs: 1.17 kB	1
bbm_bbm_1d/bbm_bbm_1d_dg.jl - rhs!:	10 allocs: 8.62 kB	10 allocs: 8.62 kB	1
bbm_bbm_1d/bbm_bbm_1d_relaxation.jl - rhs!:	2 allocs: 8.25 kB	2 allocs: 8.25 kB	1
bbm_bbm_1d/bbm_bbm_1d_upwind_relaxation.jl - rhs!:	2 allocs: 8.25 kB	2 allocs: 8.25 kB	1
hyperbolic_serre_green_naghdi_1d/hyperbolic_serre_green_naghdi_dingemans.jl - rhs!:	0 allocs: 0 B	0 allocs: 0 B
kdv_1d/kdv_1d_basic.jl - rhs!:	0 allocs: 0 B	0 allocs: 0 B
kdv_1d/kdv_1d_implicit.jl - rhs!:	0 allocs: 0 B	0 allocs: 0 B
serre_green_naghdi_1d/serre_green_naghdi_well_balanced.jl - rhs!:	0.075 k allocs: 0.66 MB	0.075 k allocs: 0.66 MB	1
svaerd_kalisch_1d/svaerd_kalisch_1d_dingemans_relaxation.jl - rhs!:	0.042 k allocs: 0.315 MB	0.042 k allocs: 0.315 MB	1
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1

[JoshuaLampert]

Should be done in #291.