refactor(Programming Basics - if Expressions - Exercise 2): The condition for the modulus in the reference solution adjusted gt -> ge

The condition in the if clause in the referrence solution is adjusted to
avoid negating the zero case:
if (number > 0) -> if (number >=0)

Closes https://youtrack.jetbrains.com/issue/EDC-415

Programming Basics/if Expressions/Exercise 2/src/Task.kt

@@ -2,7 +2,7 @@
 package ifExpressionsExercise2
 
 fun abs(number: Int): Int =
-  if (number > 0) number else -number
+  if (number >= 0) number else -number
 
 fun main() {
   println(abs(-19))  // 19

Programming Basics/if Expressions/Exercise 2/task-info.yaml

@@ -4,7 +4,7 @@ files:
   visible: true
   placeholders:
   - offset: 88
-    length: 35
+    length: 36
     placeholder_text: TODO()
 - name: test/Tests.kt
   visible: false