fix(rockandroll): change console name from 'go' to 'console'

subjects/rockandroll/README.md

@@ -23,19 +23,19 @@ Here is a possible program to test your function:
 package main
 
 import (
-  "fmt"
+        "fmt"
-  "piscine"
+        "piscine"
 )
 
 func main() {
-  fmt.Println(piscine.RockAndRoll(4))
+        fmt.Println(piscine.RockAndRoll(4))
-  fmt.Println(piscine.RockAndRoll(9))
+        fmt.Println(piscine.RockAndRoll(9))
-  fmt.Println(piscine.RockAndRoll(6))
+        fmt.Println(piscine.RockAndRoll(6))
 }
 ```
 And its output:
 
-```go
+```console
 rock$
 $
 roll$