Revise dataset access details in README

[ram-cherukuri]

Updated dataset access information and download instructions.

PhysicsNeMo Pull Request

Description

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The CHANGELOG.md is up to date with these changes.
• An issue is linked to this pull request.
• If I am implementing a new model or modifying any existing model, I have followed the Models Implementation Coding Standards.

Dependencies

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[greptile-apps]

Greptile Summary

This PR updates the Ahmed Body dataset access instructions in the README, replacing the email-based request process with a direct Hugging Face download link.

Key changes:

• Replaced email contact instruction with Hugging Face dataset link
• Added reference to PhysicsNeMo-Curator download script

Issues found:

• Typo: "Huging Face" should be "Hugging Face"
• Broken link: referenced script download_hugging_face_dataset.sh does not exist in the repository
• Minor formatting: unnecessary space before colon

Important Files Changed

Filename	Overview
examples/cfd/external_aerodynamics/aero_graph_net/README.md	Updated dataset access from email request to Hugging Face download link; contains typo "Huging", broken script reference, and minor formatting issues

[greptile-apps]

_{1 file reviewed, 4 comments}

_{Edit Code Review Agent Settings | Greptile}

[greptile-apps]

logic: The referenced script download_hugging_face_dataset.sh doesn't exist in this directory. Either add the script or remove this reference.

[greptile-apps]

style: Split into two sentences for better readability

Suggested change

	You can download the full Ahmed body dataset from Huging Face [here](https://huggingface.co/datasets/nvidia/PhysicsNeMo-CFD-Ahmed-Body). You can modify the PhysicsNeMo-Curator script to automate the download : [download_hugging_face_dataset.sh](./download_hugging_face_dataset.sh)
	You can download the full Ahmed body dataset from Hugging Face [here](https://huggingface.co/datasets/nvidia/PhysicsNeMo-CFD-Ahmed-Body). You can modify the PhysicsNeMo-Curator script to automate the download: [download_hugging_face_dataset.sh](./download_hugging_face_dataset.sh).

_{Note: If this suggestion doesn't match your team's coding style, reply to this and let me know. I'll remember it for next time!}