Update test/structuredbroadcast.jl

Add type assertion as suggested

Co-authored-by: Steven G. Johnson <stevenj@alum.mit.edu>

Author: jishnub

test/structuredbroadcast.jl

@@ -144,7 +144,7 @@ end
     @test broadcast!(sin, copy(T), T) == Tridiagonal(sin.(T))
     @test broadcast!(sin, copy(◣), ◣) == LowerTriangular(sin.(◣))
     @test broadcast!(sin, copy(◥), ◥) == UpperTriangular(sin.(◥))
-    @test broadcast!(sin, copy(UH), UH) == UpperHessenberg(sin.(UH))
+    @test broadcast!(sin, copy(UH), UH)::UpperHessenberg == UpperHessenberg(sin.(UH)::UpperHessenberg)
     @test broadcast!(sin, copy(M), M) == Matrix(sin.(M))
     @test broadcast!(*, copy(D), D, A) == Diagonal(broadcast(*, D, A))
     @test broadcast!(*, copy(Bu), Bu, A) == Bidiagonal(broadcast(*, Bu, A), :U)