Update author section with formatted GitHub link

Author: AthanasiosGourdomichalis

README.md

@@ -42,6 +42,6 @@ by clicking the logo, at the top left of the menu!
 
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 # 👤 Author
-## Athanasios Gourdomichalis - https://github.com/AthanasiosGourdomichalis
+## **Athanasios Gourdomichalis** - [GitHub Profile](https://github.com/AthanasiosGourdomichalis)
 
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