Update README.md

Author: CodedThemes

README.md

@@ -88,7 +88,7 @@ Able Pro Lite version documentation cover in its Pro version documentation - [ch
 - [NgBootstrap](https://ng-bootstrap.github.io/#/home) 5.0.0
 
 ## Directory Structure
-
+```
 able-pro/
 ├── e2e
 |    ├── src/
@@ -146,6 +146,8 @@ able-pro/
 |    ├── tslint.json
 ├── ... More
 
+```
+
 ## Author
 
 Design and code is completely written by Themeforest's design and development team. We are happy to welcome the contributors work for our all repositiories.