Update README.md

Author: atoami

README.md

@@ -9,7 +9,7 @@
 }
 ```
 
-##### 2. Add font files 
+##### 2. Add font files.
 Add font files(otf, ttf, ...) in font assets folder.
 
 ##### 3. Run the following command.
@@ -21,14 +21,18 @@ This links all fonts(`app/fonts` in example) to iOS & Android projects.
 ##### 4. Add font component.
 Add font components(`SFProDisplayMedium.js`, ...) in your project.
 
-##### 5. Now, you can use the fonts anywhere in your project.
-```javascript
+##### 5. Rebuild the project.
+You must rebuild the project after add font files.
+
+##### 6. Now, you can use the fonts anywhere in your project.
+```typescript jsx
 import { SFProDisplayMedium } from '../SFProDisplayMedium.js';
 ...
 <SFProDisplayMedium style={styles.fontStyle}>
   Text Here
 </SFProDisplayMedium>
 ```
+
 ## Demo
 You can find demo [here](https://github.com/atoami/react-native-navigation-redux-starter-kit).