Update README.md

Author: Nalin-Angrish

README.md

@@ -91,7 +91,7 @@ To build the project, follow these steps:
    ./build/main
    ```
 
-# API Reference
+## API Reference
 For details on the code structure, available classes, and how to use FlexNN in your own projects, please visit the full documentation here: [https://docs.nalinangrish.me/FlexNN](https://docs.nalinangrish.me/FlexNN).
 
 ## Known Issues / Limitations
@@ -103,4 +103,4 @@ For details on the code structure, available classes, and how to use FlexNN in y
 
 ## License
 
-This project is licensed under the Apache-2.0 License. See the LICENSE file for more details.
+This project is licensed under the Apache-2.0 License. See the LICENSE file for more details.