docs: Adjust indentation for testing sub-sections in the README.

Author: anugrahk21

README.md

@@ -54,9 +54,9 @@ Built by **Anugrah K.** as the **Capstone Project** for the **Google AI Agents I
    - [Key Security Features](#-key-security-features-in-pipeline)
    - [Extensibility: Evolving the Defense](#-extensibility-evolving-the-defense)
 10. 🧪 [Testing](#-testing-the-system)
-   - [Test Cases](#-test-case-1-normal-question-expected--pass)
-   - [Automated Testing](#-automated-testing)
-   - [CI/CD Pipeline](#-cicd-pipeline)
+    - [Test Cases](#-test-case-1-normal-question-expected--pass)
+    - [Automated Testing](#-automated-testing)
+    - [CI/CD Pipeline](#-cicd-pipeline)
 11. 📊 [Performance & Scalability](#-performance--scalability)
     - [Current Implementation](#-current-implementation-single-user-demo)
     - [Production Scaling](#-production-scaling-recommendations)