skip Zygote on nightly

Author: Michael Abbott

test/group-3.jl

@@ -1,5 +1,7 @@
 #===== Zygote =====#
 
+if VERSION < v"1.6.9" # Zygote is failing on nightly
+
 t5 = time()
 using Zygote
 
@@ -67,6 +69,8 @@ end
 
 @info @sprintf("Zygote tests took %.1f seconds", time()-t5)
 
+end # VERSION
+
 #===== ReverseDiff =====#
 #=
 t6 = time()