Remove dead links from Third Party Tools section

[cihandemir]

Cookbook Pull Request

Description

Fixes #244

The following links were returning 404:

• third_party/langchain/corrective_rag_mistral.ipynb
• third_party/langchain/langgraph_crag_mistral.ipynb
• third_party/langtrace/langtrace_mistral.ipynb
• third_party/langchain/self_rag_mistral.ipynb

Removed them from the README as they appear to be outdated or removed.

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Type of Change

What type of PR is it?

• New Cookbook
  • Notebook File
    • Does it work on google colab?
  • Markdown File
• Cookbook Update
  • Code Refactoring
  • Bug Fix
• README.md Update

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• Other (please describe):

Cookbook Checklist:

• My code is easy to read and well structured.
• I've tagged the versions of any dependency required.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings or errors.

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• My changes do not concern the cookbooks.

README.md Checklist

• I've added my cookbook to the table.

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• My changes do not concern the README file.

Additional Context

Add any other context or screenshots about the feature request here.

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[abdelhadi703]

Great catch on the dead links! 👍

While reviewing, I noticed two additional issues in the README that aren't covered by this PR:

1. Wrong link target for SubQuestionQueryEngine.ipynb (line 103): The link text says SubQuestionQueryEngine.ipynb but it points to third_party/LlamaIndex/RouterQueryEngine.ipynb instead of third_party/LlamaIndex/SubQuestionQueryEngine.ipynb. The correct file does exist.

2. Formatting issue on prompt_optimization.ipynb (line 110): There's a double closing parenthesis )) which breaks the markdown link, and the table row is missing its trailing pipe |.

I've opened a separate PR (#247) to fix these two issues, so they complement your changes here.

[cihandemir]

Thanks for the feedback and for handling the additional fixes in #247, @abdelhadi703! Much appreciated. My PR should be ready to go once the workflows are cleared.