Fix test to accomodate the related commit in s-c-function

s-c-function commit id - 40fe70d44c8649a0e1e688b3c65155c6217064b3

spring-cloud-stream/src/test/java/org/springframework/cloud/stream/function/ImplicitFunctionBindingTests.java

@@ -1493,7 +1493,7 @@ public class ImplicitFunctionBindingTests {
 			return new FunctionAroundWrapper() {
 
 				@Override
-				protected Object doApply(Message<byte[]> input,
+				protected Object doApply(Object input,
 						FunctionInvocationWrapper targetFunction) {
 					return targetFunction.apply(input);
 				}