update doc

app/src/content/chapters/available-blocks.mdx

@@ -8,9 +8,9 @@ import Note from '../../components/Note.astro';
 import FullWidth from '../../components/FullWidth.astro';
 import Accordion from '../../components/Accordion.astro';
 
-## Available blocks
+## Available components
 
-All the following blocks are available in the article.mdx file. You can also create your own blocks by creating a new component in the components folder.
+**All** the following **components** are available in the **article.mdx** file. You can also create your own **components** by creating a new file in the `/components` folder.
 
 <br/>
 <div className="button-group">

app/src/content/chapters/writing-your-content.mdx

@@ -9,16 +9,16 @@ import audioDemo from '../assets/audio/audio-example.wav';
 
 ## Writing Your Content
 
-### Introduction
+### **Introduction**
 
-Your article lives in one place
+Your **article** lives in **one place**
 
-Everything is self-contained under `app/src/content/`:
-- MDX: `article.mdx` and [optional chapters](#chapters) in `chapters/`
-- Assets: `assets/` (images, audio; tracked via Git LFS)
-- Embeds: `embed/` (HTMLEmbed for Plotly/D3, etc.) — see [HtmlEmbed](#htmlembed)
+Everything is **self-contained** under `app/src/content/`:
+- **MDX**: `article.mdx` and [**optional chapters**](#chapters) in `chapters/`
+- **Assets**: `assets/` (**images**, **audio**; tracked via **Git LFS**)
+- **Embeds**: `embed/` (**HTMLEmbed** for **Plotly/D3**, etc.) — see [**HtmlEmbed**](#htmlembed)
 
-The `article.mdx` file is the main entry point of your article.
+The `article.mdx` file is the **main entry point** of your article.
 
 <small className="muted">Example</small>
 ```mdx