fix: Update README.md

Author: raminr77

README.md

@@ -25,6 +25,8 @@ src/
 
 The project includes complete configurations for **ESLint**, **Prettier**, **Stylelint**, **Husky** (pre-commit hooks), and **CI/CD via GitHub Actions**.
 
+In this project we're using `RTK Query` for API request system and `Redux Toolkit` for API cache system and state management.  
+
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 ## ⚙️ Getting Started Locally