Fix wrong wording from Amazon to Azure

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Comment From: tzolov

Hi @SandraAhlgrimm , thank you for the contribution. We have moved the Azure OpenAI documentation for the README to the adoc: https://docs.spring.io/spring-ai/reference/api/clients/azure-openai-chat.html source: https://github.com/spring-projects/spring-ai/blob/main/spring-ai-docs/src/main/antora/modules/ROOT/pages/api/clients/azure-openai-chat.adoc

Feel free to check if this issue is still present? If not we can close this PR.

Comment From: markpollack

As Christian said, the readme has changed as part of our general effort to improve docs. The content is now in the antora docs with only a small readme.md remaining in the src tree that points to it.

Closing the PR, please take a look at azure-openai-chat.adoc to review it's contents.

Comment From: SandraAhlgrimm

Linking to the documententation makes sense. Thanks.