Update lessons/insertion.md

Abhijit25Mishra · Utkarsh1504 · web-flow · commit 64074beae360 · 2021-10-01T22:38:29.000+05:30
Co-authored-by: Utkarsh Mishra &lt;76392681+Utkarsh1504@users.noreply.github.com&gt;
diff --git a/lessons/insertion.md b/lessons/insertion.md
@@ -126,7 +126,8 @@ you can visualize this at [hackerearth](https://www.hackerearth.com/practice/alg
 
 
 
-### Applications
+## Applications
+``
 
 
 

Original file line number	Diff line number	Diff line change
`@@ -126,7 +126,8 @@ you can visualize this at [hackerearth](https://www.hackerearth.com/practice/alg`
`126`	`126`
`127`	`127`
`128`	`128`
`129`		`-### Applications`
	`129`	`+## Applications`
	`130`	+``
`130`	`131`
`131`	`132`
`132`	`133`