bump version to 0.2.19 and update doc (microsoft#1971)

* bump version to 0.2.19 and update doc

* doc update

Author: sonichi

README.md

@@ -12,12 +12,12 @@
     <img src="https://github.com/microsoft/autogen/blob/main/website/static/img/flaml.svg"  width=200>
     <br>
 </p> -->
+:fire: Mar 3: What's new in AutoGen? 📰[Blog](https://microsoft.github.io/autogen/blog/2024/03/03/AutoGen-Update); 📺[Youtube](https://www.youtube.com/watch?v=j_mtwQiaLGU).
+
 :fire: Mar 1: the first AutoGen multi-agent experiment on the challenging [GAIA](https://huggingface.co/spaces/gaia-benchmark/leaderboard) benchmark achieved the No. 1 accuracy in all the three levels.
 
 :fire: Jan 30: AutoGen is highlighted by Peter Lee in Microsoft Research Forum [Keynote](https://t.co/nUBSjPDjqD).
 
-:warning: Jan 23: **Breaking Change in Latest Release v0.2.8** `use_docker` defaults to `True` for code-execution. See [blog post](https://microsoft.github.io/autogen/blog/2024/01/23/Code-execution-in-docker) for details and [FAQ](https://microsoft.github.io/autogen/docs/FAQ#agents-are-throwing-due-to-docker-not-running-how-can-i-resolve-this) for troubleshooting any issues.
-
 :fire: Dec 31: [AutoGen: Enabling Next-Gen LLM Applications via Multi-Agent Conversation Framework](https://arxiv.org/abs/2308.08155) is selected by [TheSequence: My Five Favorite AI Papers of 2023](https://thesequence.substack.com/p/my-five-favorite-ai-papers-of-2023).
 
 <!-- :fire: Nov 24: pyautogen [v0.2](https://github.com/microsoft/autogen/releases/tag/v0.2.0) is released with many updates and new features compared to v0.1.1. It switches to using openai-python v1. Please read the [migration guide](https://microsoft.github.io/autogen/docs/Installation#python). -->

autogen/version.py

@@ -1 +1 @@
-__version__ = "0.2.18"
+__version__ = "0.2.19"

website/docs/tutorial/what-is-next.md

@@ -24,6 +24,7 @@ topics:
 
 - Read the [topic docs](/docs/topics) to learn more
 - Read the examples and guides in the [notebooks section](/docs/notebooks)
+- Check [research](/docs/Research) and [blog](/blog)
 
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