Update application figure

[qingyun-wu]

Why are these changes needed?

Update application figure to match with the latest arxiv draft

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

Attention: 52 lines in your changes are missing coverage. Please review.

Comparison is base (370ebf5) 29.81% compared to head (ef40920) 27.81%.
Report is 24 commits behind head on main.

Files	Patch %	Lines
autogen/oai/client.py	0.00%	16 Missing ⚠️
autogen/agentchat/contrib/gpt_assistant_agent.py	0.00%	11 Missing ⚠️
...gen/agentchat/contrib/retrieve_user_proxy_agent.py	0.00%	9 Missing ⚠️
autogen/oai/openai_utils.py	14.28%	6 Missing ⚠️
autogen/retrieve_utils.py	0.00%	6 Missing ⚠️
...ntchat/contrib/qdrant_retrieve_user_proxy_agent.py	0.00%	2 Missing ⚠️
autogen/oai/completion.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #352      +/-   ##
==========================================
- Coverage   29.81%   27.81%   -2.00%     
==========================================
  Files          27       27              
  Lines        3448     3480      +32     
  Branches      780      789       +9     
==========================================
- Hits         1028      968      -60     
- Misses       2346     2441      +95     
+ Partials       74       71       -3     

Flag	Coverage Δ
unittests	27.75% <7.14%> (-2.00%)	⬇️

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[sonichi]

The name of A3 is too narrow.