Update GettingStartedWithFPSection.scala

I mean function isSorted has a mistake because isSorted(Array(1, 3, 5, 7), (x: Int, y: Int) => x > y) should be return false:
first step 1 > 3 is false

Author: slashdev1

src/main/scala/fpinscalalib/GettingStartedWithFPSection.scala

@@ -56,7 +56,7 @@ object GettingStartedWithFPSection
       @annotation.tailrec
       def go(n: Int): Boolean =
         if (n >= as.length - 1) true
-        else if (ordering(as(n), as(n + 1))) false
+        else if (!ordering(as(n), as(n + 1))) false
         else go(n + 1)
 
       go(0)