Merge pull request #2848 from romanstetsyk/part2e-links

update links to react docs for part2e

Author: mluukkai

src/content/2/en/part2e.md

@@ -77,7 +77,7 @@ In regular HTML, classes are defined as the value of the <i>class</i> attribute:
 <li class="note">some text...</li>
 ```
 
-In React we have to use the [className](https://reactjs.org/docs/dom-elements.html#classname) attribute instead of the class attribute. With this in mind, let's make the following changes to our <i>Note</i> component:
+In React we have to use the [className](https://react.dev/learn#adding-styles) attribute instead of the class attribute. With this in mind, let's make the following changes to our <i>Note</i> component:
 
 ```js
 const Note = ({ note, toggleImportance }) => {
@@ -205,7 +205,7 @@ The code for the current state of our application can be found in the  <i>part2-
 
 React also makes it possible to write styles directly in the code as so-called [inline styles](https://react-cn.github.io/react/tips/inline-styles.html).
 
-The idea behind defining inline styles is extremely simple. Any React component or element can be provided with a set of CSS properties as a JavaScript object through the [style](https://reactjs.org/docs/dom-elements.html#style) attribute.
+The idea behind defining inline styles is extremely simple. Any React component or element can be provided with a set of CSS properties as a JavaScript object through the [style](https://react.dev/reference/react-dom/components/common#applying-css-styles) attribute.
 
 CSS rules are defined slightly differently in JavaScript than in normal CSS files. Let's say that we wanted to give some element the color green and italic font that's 16 pixels in size. In CSS, it would look like this: