Apply suggestions from code review

Co-authored-by: Olivier Tassinari <[email protected]>

docs/pages/blog/callback-support-in-style-overrides.md

@@ -1,15 +1,15 @@
 ---
 title: Introducing callback support in style overrides
 description: We're excited to introduce callback support for global theme overrides in this minor version update!
-date: 2022-01-20T00:00:00.000Z
+date: 2022-01-31T00:00:00.000Z
 authors: ['siriwatknp']
 tags: ['MUI Core', 'News']
 card: false
 ---
 
-MUI Core [v5.3.0](https://github.com/mui-org/material-ui/releases/tag/v5.3.0) introduces the ability to write a callback in style overrides (global theming), giving you full control of component customization at the theme level.
+<span class="x x-first x-last">[</span>MUI Core v5.3.0](https://github.com/mui-org/material-ui/releases/tag/v5.3.0) introduces the ability to write a callback in style overrides (global theming), giving you full control of component customization at the theme level.
 
-Why is using a callback better than the existing plain object? Let me explain from the beginning...
+Why is using a callback better than the existing plain object? Let me explain from the beginning<span class="x x-first x-last">…</span>
 
 ## The problems