cmd: continue lint fixes.

cmd/rolldie/main.go

@@ -17,11 +17,11 @@ func rollDie(count, sides int) []int {
 	sum := 0
 	var rolls []int
 
- for i := 0; i < count; i++ {
-        roll := rand.IntN(sides) + 1
-        sum += roll
-        rolls = append(rolls, roll)
-    }
+	for range count {
+		roll := rand.IntN(sides) + 1
+		sum += roll
+		rolls = append(rolls, roll)
+	}
 
 	rolls = append(rolls, sum)
 	return rolls