docs: Add What's new section to README.md

Merge https://github.com/google/adk-python/pull/2668

COPYBARA_INTEGRATE_REVIEW=https://github.com/google/adk-python/pull/2668 from joefernandez:patch-1 7bc04963755af76fe289d1855341553057348a55
PiperOrigin-RevId: 797958558
This commit is contained in:
Joe Fernandez
2025-08-21 16:24:58 -07:00
committed by Copybara-Service
parent 80d188199b
commit ccab076ace
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@@ -27,6 +27,11 @@ Agent Development Kit (ADK) is a flexible and modular framework for developing a
---
## ✨ What's new
- **Agent Config**: Build agents without code. Check out the
[Agent Config](https://google.github.io/adk-docs/agents/config/) feature.
## ✨ Key Features
- **Rich Tool Ecosystem**: Utilize pre-built tools, custom functions,