Update FAQ.md with api_base vs base_url question

[gagb]

Why are these changes needed?

added a faq for api_base vs base_url because people were asking about it frequently.

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

All modified and coverable lines are covered by tests ✅

Comparison is base (a5e3c9d) 28.70% compared to head (4a6549d) 28.70%.

Additional details and impacted files

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  Files          27       27           
  Lines        3383     3383           
  Branches      760      760           
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  Hits          971      971           
  Misses       2341     2341           
  Partials       71       71           

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unittests	28.64% <ø> (ø)

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[rickyloynd-microsoft]

Very nice!

[sonichi]

Do we need it given:
https://microsoft.github.io/autogen/docs/Installation#migration-guide-to-v02
?

[rickyloynd-microsoft]

Do we need it given: https://microsoft.github.io/autogen/docs/Installation#migration-guide-to-v02 ?

I think the repetition is helpful for people who don't carefully read or remember the migration guide, and people who pick up an old piece of code from somewhere without realizing there was an API migration.

[BeibinLi]

LGTM.

[BeibinLi]

Alternatively, should we check "api_base" and "base_url" in the config dictionary, and decide which one to use based on the OpenAI Version?

[sonichi]

Do we need it given: https://microsoft.github.io/autogen/docs/Installation#migration-guide-to-v02 ?

I think the repetition is helpful for people who don't carefully read or remember the migration guide, and people who pick up an old piece of code from somewhere without realizing there was an API migration.

How about adding a link to the migration guide page too?

[sonichi]

Alternatively, should we check "api_base" and "base_url" in the config dictionary, and decide which one to use based on the OpenAI Version?

That's also a good idea.