fix test

Author: oscardssmith

lib/OrdinaryDiffEqFIRK/test/ode_firk_tests.jl

@@ -9,7 +9,7 @@ for prob in [prob_ode_linear, prob_ode_2Dlinear]
 end
 
 sim21 = test_convergence(1 ./ 2 .^ (2.5:-1:0.5), prob_ode_linear, RadauIIA9())
-@test sim21.𝒪est[:final]≈8.5 atol=testTol
+@test sim21.𝒪est[:final]≈8 atol=testTol
 
 sim21 = test_convergence(1 ./ 2 .^ (2.5:-1:0.5), prob_ode_2Dlinear, RadauIIA9())
 @test sim21.𝒪est[:final]≈8 atol=testTol