Fix default diff_type of AdaptiveRadau

Author: devmotion

lib/OrdinaryDiffEqFIRK/src/algorithms.jl

@@ -183,7 +183,7 @@ end
 
 function AdaptiveRadau(; chunk_size = Val{0}(), autodiff = AutoForwardDiff(),
         standardtag = Val{true}(), concrete_jac = nothing,
-        diff_type = Val{:forward}, min_order = 5, max_order = 13, threading = false,
+        diff_type = Val{:forward}(), min_order = 5, max_order = 13, threading = false,
         linsolve = nothing, precs = DEFAULT_PRECS,
         extrapolant = :dense, fast_convergence_cutoff = 1 // 5,
         new_W_γdt_cutoff = 1 // 5,