Update CUSTOMIZE.md

Author: george-gca

CUSTOMIZE.md

@@ -16,7 +16,8 @@ The project is structured as follows, focusing on the main components that you w
 ├── 📄 _config.yml: the configuration file of the template
 ├── 📂 _data/: contains some of the data used in the template
 │   ├── 📄 cv.yml: CV in YAML format, used when assets/json/resume.json is not found
-│   └── 📄 repositories.yml: users and repositories info in YAML format
+│   ├── 📄 repositories.yml: users and repositories info in YAML format
+│   └── 📄 socials.yml: your social media and contact info in YAML format
 ├── 📂 _includes/: contains code parts that are included in the main HTML file
 │   └── 📄 news.liquid: defines the news section layout in the about page
 ├── 📂 _layouts/: contains the layouts to choose from in the frontmatter of the Markdown files