Update readme

README.md

@@ -63,17 +63,17 @@ package main
 
 import "fmt"
 
-func fibonacci(n int) int {
+func fib(n int) int {
 	if n <= 1 {
 		return n
 	}
-	return fibonacci(n-1) + fibonacci(n-2)
+	return fib(n-1) + fib(n-2)
 }
 
 func main() {
 	n := 10
 	for i := 0; i < n; i++ {
-		fmt.Println(fibonacci(i))
+		fmt.Println(fib(i))
 	}
 }
 ```
@@ -83,7 +83,7 @@ $ mingo main.go
 ```
 
 ```go
-package main;import "fmt";func fibonacci(n int)int{if n<=1{return n};return fibonacci(n-1)+fibonacci(n-2)};func main(){n:=10;for i:=0;i<n;i++{fmt.Println(fibonacci(i))}};
+package main;import "fmt";func fib(n int)int{if n<=1{return n};return fib(n-1)+fib(n-2)};func main(){n:=10;for i:=0;i<n;i++{fmt.Println(fib(i))}};
 ```
 
 ---