Re-translate the Japanese version (#1871)

* Retranslate Japanese docs with GPT-5.4

* Retranslate Japanese code with GPT-5.4

ja/codes/go/chapter_dynamic_programming/coin_change_test.go

@@ -0,0 +1,23 @@
+// File: coin_change_test.go
+// Created Time: 2023-07-23
+// Author: Reanon (793584285@qq.com)
+
+package chapter_dynamic_programming
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestCoinChange(t *testing.T) {
+	coins := []int{1, 2, 5}
+	amt := 4
+
+	// 動的計画法
+	res := coinChangeDP(coins, amt)
+	fmt.Printf("目標金額を作るのに必要な最小硬貨枚数は %d\n", res)
+
+	// 空間最適化後の動的計画法
+	res = coinChangeDPComp(coins, amt)
+	fmt.Printf("目標金額を作るのに必要な最小硬貨枚数は %d\n", res)
+}