how to bold in readme.md code example

Example 1: text bold in .md file

**My Bold Text**

Example 2: markdown image

![GitHub Logo](/images/logo.png)
Format: ![Alt Text](url)

Example 3: Markdown image

![Text here](URL)

Example 4: githum readme bold

**This text will be bold**
__This will also be bold__

_You **can** combine them_