Update link to ES6 specification

Author: vejol

src/content/1/en/part1a.md

@@ -130,7 +130,7 @@ The function is then assigned to a constant variable <i>App</i>:
 const App = ...
 ```
 
-There are a few ways to define functions in JavaScript. Here we will use [arrow functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions), which are described in a newer version of JavaScript known as [ECMAScript 6](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const), also called ES6.
+There are a few ways to define functions in JavaScript. Here we will use [arrow functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions), which are described in a version of JavaScript known as [ECMAScript 6](https://262.ecma-international.org/6.0/index.html?_gl=1*xxe99l*_ga*MjA1MjAzOTEwMC4xNzc0MjU2OTkx*_ga_TDCK4DWEPP*czE3NzQyNTY5OTEkbzEkZzEkdDE3NzQyNTczNzUkajYwJGwwJGgw), also called ES6.
 
 Because the function consists of only a single expression we have used a shorthand, which represents this piece of code:
 

src/content/1/es/part1a.md

@@ -142,7 +142,7 @@ La función luego se asigna a una variable constante <i>App</i>:
 const App = ...
 ```
 
-Hay algunas formas de definir funciones en JavaScript. Aquí utilizaremos [funciones de flecha](https://developer.mozilla.org/es/docs/Web/JavaScript/Reference/Functions/Arrow_functions), que se describen en una versión más reciente de JavaScript conocida como [ECMAScript 6](http://es6-features.org/#Constants), también llamada ES6.
+Hay algunas formas de definir funciones en JavaScript. Aquí utilizaremos [funciones de flecha](https://developer.mozilla.org/es/docs/Web/JavaScript/Reference/Functions/Arrow_functions), que se describen en una versión más reciente de JavaScript conocida como [ECMAScript 6](https://262.ecma-international.org/6.0/index.html?_gl=1*xxe99l*_ga*MjA1MjAzOTEwMC4xNzc0MjU2OTkx*_ga_TDCK4DWEPP*czE3NzQyNTY5OTEkbzEkZzEkdDE3NzQyNTczNzUkajYwJGwwJGgw), también llamada ES6.
 
 Debido a que la función consta de una sola expresión, hemos utilizado una abreviatura, que representa este fragmento de código:
 

src/content/1/fi/osa1a.md

@@ -130,7 +130,7 @@ joka sijoitetaan vakioarvoiseen muuttujaan <i>App</i>
 const App = ...
 ```
 
-JavaScriptissa on muutama tapa määritellä funktioita. Käytämme nyt JavaScriptin hieman uudemman version [ECMAScript 6:n](http://es6-features.org/#Constants) eli ES6:n [nuolifunktiota](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions) (arrow functions).
+JavaScriptissa on muutama tapa määritellä funktioita. Käytämme nyt JavaScriptin vuonna 2015 julkaistun version [ECMAScript 6:n](https://262.ecma-international.org/6.0/index.html?_gl=1*xxe99l*_ga*MjA1MjAzOTEwMC4xNzc0MjU2OTkx*_ga_TDCK4DWEPP*czE3NzQyNTY5OTEkbzEkZzEkdDE3NzQyNTczNzUkajYwJGwwJGgw) eli ES6:n [nuolifunktiota](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions) (arrow functions).
 
 Koska funktio koostuu vain yhdestä lausekkeesta, käytössämme on lyhennysmerkintä, joka vastaa seuraavaa koodia:
 

src/content/1/ptbr/part1a.md

@@ -112,7 +112,7 @@ A função é, então, atribuída a uma (variável) constante <i>App</i>:
 const App = ...
 ```
 
-Existem algumas maneiras de definir funções em JavaScript. Aqui usaremos as [funções de seta](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions) (arrow functions), que são descritas em uma versão mais recente de JavaScript conhecida como [ECMAScript 6](http://es6-features.org/#Constants), também chamada de ES6.
+Existem algumas maneiras de definir funções em JavaScript. Aqui usaremos as [funções de seta](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions) (arrow functions), que são descritas em uma versão mais recente de JavaScript conhecida como [ECMAScript 6](https://262.ecma-international.org/6.0/index.html?_gl=1*xxe99l*_ga*MjA1MjAzOTEwMC4xNzc0MjU2OTkx*_ga_TDCK4DWEPP*czE3NzQyNTY5OTEkbzEkZzEkdDE3NzQyNTczNzUkajYwJGwwJGgw), também chamada de ES6.
 
 Por conta da função consistir em apenas uma única expressão, usamos uma notação abreviada, que representa este trecho de código:
 

src/content/1/zh/part1a.md

@@ -153,8 +153,8 @@ const App = () => (
 const App = ...
 ```
 
-<!-- There are a few ways to define functions in JavaScript. Here we will use [arrow functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions), which are described in a newer version of JavaScript known as [ECMAScript 6](http://es6-features.org/#Constants), also called ES6.-->
-在JavaScript中定义函数有多种方法。这里我们将使用[箭头函数](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions)，它是在较新的JavaScript版本[ECMAScript 6](http://es6-features.org/#Constants)，又称ES6中引入的。
+<!-- There are a few ways to define functions in JavaScript. Here we will use [arrow functions](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions), which are described in a newer version of JavaScript known as [ECMAScript 6](https://262.ecma-international.org/6.0/index.html?_gl=1*xxe99l*_ga*MjA1MjAzOTEwMC4xNzc0MjU2OTkx*_ga_TDCK4DWEPP*czE3NzQyNTY5OTEkbzEkZzEkdDE3NzQyNTczNzUkajYwJGwwJGgw), also called ES6.-->
+在JavaScript中定义函数有多种方法。这里我们将使用[箭头函数](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions)，它是在较新的JavaScript版本[ECMAScript 6](https://262.ecma-international.org/6.0/index.html?_gl=1*xxe99l*_ga*MjA1MjAzOTEwMC4xNzc0MjU2OTkx*_ga_TDCK4DWEPP*czE3NzQyNTY5OTEkbzEkZzEkdDE3NzQyNTczNzUkajYwJGwwJGgw)，又称ES6中引入的。
 
 <!-- Because the function consists of only a single expression we have used a shorthand, which represents this piece of code:-->
 因为函数只由一个表达式组成，所以我们使用了简写来表示这一段代码：