Switch base endpoint to github.ai

[sgoedecke]

https://github.com/github/models-gateway/issues/361

There are some changes to the notebook metadata/etc that appeared when I ran them for testing. I think it's fine to commit these.

[Copilot]

Pull Request Overview

This PR updates the base endpoint from "https://models.inference.ai.azure.com" to "https://models.github.ai/inference" and revises model naming conventions across JavaScript samples and Python cookbooks. Key changes include updating endpoint URLs, modifying model identifier strings (e.g. from "gpt-4o-mini" to "openai/gpt-4o-mini" and various mistralai model names), and adjusting notebook metadata such as kernelspec display names and execution counts.

Reviewed Changes

Copilot reviewed 42 out of 49 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
samples/js/azure_ai_inference/chat_with_image_file.js	Updated endpoint URL and model name formatting.
samples/js/azure_ai_inference/basic.js	Updated endpoint URL and model name; streamlined comments.
cookbooks/python/openai/*.ipynb	Updated base URL, model identifier, and notebook metadata.
cookbooks/python/mistralai/*.ipynb	Updated endpoint and mistralai model names (with some inconsistencies).
cookbooks/python/llamaindex/rag_getting_started.ipynb	Updated kernelspec display name.
cookbooks/python/langchain/lc_openai_getting_started.ipynb	Updated endpoint, model name, and kernelspec display name.

Files not reviewed (7)

• cookbooks/python/openai/data/hotel_invoices/transformed_invoice_json/transformed_hampton_20190411_extracted.json: Language not supported
• cookbooks/python/openai/data/hotel_invoices/transformed_invoice_json/transformed_madison-502875_extracted.json: Language not supported
• cookbooks/python/openai/data/hotel_invoices/transformed_invoice_json/transformed_madison_folio_g_cp_efolio5895707_extracted.json: Language not supported
• samples/curl/basic.sh: Language not supported
• samples/curl/image_sample.sh: Language not supported
• samples/curl/multi_turn.sh: Language not supported
• samples/curl/streaming.sh: Language not supported

Comments suppressed due to low confidence (1)

cookbooks/python/mistralai/evaluation.ipynb:33

• The global default model name is set to 'mistral-ai/mistral-large', but later the run_mistral() function uses 'mistral-ai/mistral-small' as the default. Consider unifying the default model specification for consistency.

model_name = "mistral-ai/mistral-large"

[maraisr]

LGTM ✨