fix(podiumposition): re-format golang codeblock

subjects/podiumposition/README.md

@@ -28,7 +28,13 @@ import (
 )
 
 func main() {
-        position := [][]string{{"4th Place"}, {"3rd Place"}, {"2nd Place"}, {"1st Place"}}
+
+    p4 := []string{"4th Place"}
+    p3 := []string{"3rd Place"}
+    p2 := []string{"2nd Place"}
+    p1 := []string{"1st Place"}
+
+    position := [][]string{p4, p3, p2, p1}
     fmt.Println(piscine.PodiumPosition(position))
 }
 ```