Update make-a-github-readme.mdx

Author: sonnynomnom

projects/make-a-github-readme/make-a-github-readme.mdx

@@ -72,6 +72,18 @@ You can kick off the file with a H1 heading with a single `#`:
 # Hello, World! 🌎 I'm Gabby 👋
 ```
 
+### Text Formatting
+
+Create emphasis in text with:
+
+```markdown
+_italicize_
+
+**bold**
+
+~~strikethrough~~
+```
+
 ### Lists
 
 Put an asterisk (`*`), dash (`-`), or number (`1.`) before each list item. Each option creates bullet points, dashed lists, and numbered lists, respectively. For example:
@@ -84,8 +96,6 @@ currently:
 - ‼️ hackNY '25
 ```
 
-### 
-
 ### Links
 
 ```markdown
@@ -113,7 +123,13 @@ There are many plugins and ways to personalize your README!
 - SVGs (Vector images)
 - Here’s a [superlist](https://github.com/abhisheknaiidu/awesome-github-profile-readme?tab=readme-ov-file#tools) of things you can embed – everything from stats on what languages you use, visitor counters, jokes, or even music players!
 
-## Examples for inspo
+## #30NitesOfCode Pet Embed
+
+If you are participating in [#30NitesOfCode](https://www.codedex.io/30-nites-of-code), add your pet to your GitHub README as well!
+
+![#30NitesOfCode example](https://i.imgur.com/pR6asfj.gif)
+
+## Examples for Inspo
 
 Here are some from my friends: