Fix misleading comment regarding storage struct reference in 06_ArrayAndStruct (#898)

06_ArrayAndStruct/ArrayAndStruct.sol

@@ -43,7 +43,7 @@ contract StructTypes {
     //  给结构体赋值
     // 方法1:在函数中创建一个storage的struct引用
     function initStudent1() external{
-        Student storage _student = student; // assign a copy of student
+        Student storage _student = student; // assign a reference to student
         _student.id = 11;
         _student.score = 100;
     }

06_ArrayAndStruct/readme.md

@@ -115,7 +115,7 @@ Student student; // 初始一个student结构体
 //  给结构体赋值
 // 方法1:在函数中创建一个storage的struct引用
 function initStudent1() external{
-    Student storage _student = student; // assign a copy of student
+    Student storage _student = student; // assign a reference to student
     _student.id = 11;
     _student.score = 100;
 }

Languages/en/06_ArrayAndStruct_en/ArrayAndStruct.sol

@@ -44,7 +44,7 @@ contract StructTypes {
     //  assign value to structure
     // Method 1: Create a storage struct reference in the function
     function initStudent1() external{
-        Student storage _student = student; // assign a copy of student
+        Student storage _student = student; // assign a reference to student
         _student.id = 11;
         _student.score = 100;
     }

Languages/en/06_ArrayAndStruct_en/readme.md

@@ -93,7 +93,7 @@ You can define new types in the form of `struct` in Solidity. Elements of `struc
     //  assign value to structure
     // Method 1: Create a storage struct reference in the function
     function initStudent1() external{
-        Student storage _student = student; // assign a copy of student
+        Student storage _student = student; // assign a reference to student
         _student.id = 11;
         _student.score = 100;
     }

Languages/ja/06_ArrayAndStruct_ja/ArrayAndStruct.sol

@@ -44,7 +44,7 @@ contract StructTypes {
     //  assign value to structure（構造体への値の代入）
     // Method 1: Create a storage struct reference in the function（関数内でstorage型の構造体の参照を作成する）
     function initStudent1() external{
-        Student storage _student = student; // assign a copy of student（構造体studentのコピーを代入する）
+        Student storage _student = student; // assign a reference to student（構造体studentへの参照を代入する）
         _student.id = 11;
         _student.score = 100;
     }

Languages/ja/06_ArrayAndStruct_ja/readme.md

@@ -94,7 +94,7 @@ Solidityにおいて、`struct`というフォーマットによって新しい
     // Method 1: Create a storage struct reference in the function
     //（方法1: 関数にてstorage型構造体の参照を作成する）
     function initStudent1() external{
-        Student storage _student = student; // assign a copy of student
+        Student storage _student = student; // assign a reference to student
         _student.id = 11;
         _student.score = 100;
     }