typo in a test

Author: Michael Abbott

test/layers/basic.jl

@@ -163,7 +163,7 @@ import Flux: activations
 
       b3 = Flux.Bilinear(randn(Float16, 3,4,5), true, tanh)
       @test b3.σ == tanh
-      @test b2.bias isa Vector{Float16}
+      @test b3.bias isa Vector{Float16}
       @test size(b3(rand(4), rand(5))) == (3,)
 
       b4 = Flux.Bilinear(3,3,7; bias=1:7, init=Flux.zeros)