docs(getters-setters-virtuals): fix typos (#13074 #12811 #12655)

Co-authored-by: sliterok <korobatov2011@yandex.ru>
Co-authored-by: William Gurzoni <william_luizat@hotmail.com>

docs/manual/core-concepts/getters-setters-virtuals.md

@@ -15,7 +15,7 @@ const User = sequelize.define('user', {
   username: {
   username: {
     type: DataTypes.STRING,
     type: DataTypes.STRING,
     get() {
     get() {
-      const rawValue = this.getDataValue(username);
+      const rawValue = this.getDataValue('username');
       return rawValue ? rawValue.toUpperCase() : null;
       return rawValue ? rawValue.toUpperCase() : null;
     }
     }
   }
   }
@@ -27,10 +27,10 @@ This getter, just like a standard JavaScript getter, is called automatically whe
 ```js
 ```js
 const user = User.build({ username: 'SuperUser123' });
 const user = User.build({ username: 'SuperUser123' });
 console.log(user.username); // 'SUPERUSER123'
 console.log(user.username); // 'SUPERUSER123'
-console.log(user.getDataValue(username)); // 'SuperUser123'
+console.log(user.getDataValue('username')); // 'SuperUser123'
 ```
 ```
 
 
-Note that, although `SUPERUSER123` was logged above, the value truly stored in the database is still `SuperUser123`. We used `this.getDataValue(username)` to obtain this value, and converted it to uppercase.
+Note that, although `SUPERUSER123` was logged above, the value truly stored in the database is still `SuperUser123`. We used `this.getDataValue('username')` to obtain this value, and converted it to uppercase.
 
 
 Had we tried to use `this.username` in the getter instead, we would have gotten an infinite loop! This is why Sequelize provides the `getDataValue` method.
 Had we tried to use `this.username` in the getter instead, we would have gotten an infinite loop! This is why Sequelize provides the `getDataValue` method.
 
 
@@ -55,7 +55,7 @@ const User = sequelize.define('user', {
 ```js
 ```js
 const user = User.build({ username: 'someone', password: 'NotSo§tr0ngP4$SW0RD!' });
 const user = User.build({ username: 'someone', password: 'NotSo§tr0ngP4$SW0RD!' });
 console.log(user.password); // '7cfc84b8ea898bb72462e78b4643cfccd77e9f05678ec2ce78754147ba947acc'
 console.log(user.password); // '7cfc84b8ea898bb72462e78b4643cfccd77e9f05678ec2ce78754147ba947acc'
-console.log(user.getDataValue(password)); // '7cfc84b8ea898bb72462e78b4643cfccd77e9f05678ec2ce78754147ba947acc'
+console.log(user.getDataValue('password')); // '7cfc84b8ea898bb72462e78b4643cfccd77e9f05678ec2ce78754147ba947acc'
 ```
 ```
 
 
 Observe that Sequelize called the setter automatically, before even sending data to the database. The only data the database ever saw was the already hashed value.
 Observe that Sequelize called the setter automatically, before even sending data to the database. The only data the database ever saw was the already hashed value.