Update test/core/adjoint_tests.jl

Co-authored-by: Christopher Rackauckas <accounts@chrisrackauckas.com>

Author: m-bossart

lib/SimpleNonlinearSolve/test/core/adjoint_tests.jl

@@ -17,5 +17,5 @@
     ∂p_tracker = Tracker.data(only(Tracker.gradient(solve_nlprob, p)))
     ∂p_reversediff = ReverseDiff.gradient(solve_nlprob, p)
     @test ∂p_zygote ≈ ∂p_tracker ≈ ∂p_reversediff
-    #@test ∂p_zygote ≈ ∂p_forwarddiff ≈ ∂p_tracker ≈ ∂p_reversediff
+    @test ∂p_zygote ≈ ∂p_forwarddiff ≈ ∂p_tracker ≈ ∂p_reversediff
 end