Fixed example notebook links in README.md

[drscotthawley]

Updated notebook links and paths for examples in README.

What does this PR do?

When example notebook files got moved, Colab links no longer resolved properly. This PR fixes that.

Fixes #160 and other broken links.

Before submitting

• [ x] Did you make sure title is self-explanatory and the description concisely explains the PR?
• [ x] Did you make sure your PR does only one thing, instead of bundling different changes together?
• [ x] Did you list all the breaking changes introduced by this pull request?
• [ x] Did you test your PR locally with pytest command?
• [o ] Did you run pre-commit hooks with pre-commit run -a command? N/A: No code changes were made. Only README.md was changed

Did you have fun?

Yes.

Make sure you had fun coding 🙃

Summary by Sourcery

Documentation:

• Fix README links and paths for the model comparison, MNIST example, and minimal training notebooks so their Colab badges open the correct files.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Updates README example notebook references so that inline paths and Google Colab links match the new example notebook locations and filenames.

File-Level Changes

Change	Details	Files
Update model comparison GIF notebook path and Colab link to the current 2D tutorials location.	Replace reference to models in examples/models with explanation that the GIF is produced by the 2D_tutorials/model-comparison-plotting.ipynb notebook Update the corresponding Google Colab URL to point to examples/2D_tutorials/model-comparison-plotting.ipynb in the repository	README.md
Update MNIST example notebook path and Colab link to the current images examples location.	Change inline notebook path from examples/notebooks/mnist_example.ipynb to examples/images/mnist_example.ipynb Update the corresponding Google Colab URL to point to examples/images/mnist_example.ipynb in the repository	README.md
Update the minimal training tutorial Colab link to the renamed 2D tutorial notebook.	Change the Colab link target from examples/notebooks/training-8gaussians-to-moons.ipynb to examples/2D_tutorials/tutorial_training_8_gaussians_to_moons.ipynb while keeping the surrounding text unchanged	README.md

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#160	Update the broken Colab link to model-comparison-plotting.ipynb in the README so that it points to the correct, existing notebook path.	✅

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[sourcery-ai]

Hey - I've found 1 issue

Prompt for AI Agents

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="README.md" line_range="122" />
<code_context>
-Run a simple minimal example here [![Run in Google Colab](https://img.shields.io/static/v1?label=Run%20in&message=Google%20Colab&color=orange&logo=Google%20Cloud)](https://colab.research.google.com/github/atong01/conditional-flow-matching/blob/master/examples/notebooks/training-8gaussians-to-moons.ipynb). Or install the more efficient code locally with these steps.
+Run a simple minimal example here [![Run in Google Colab](https://img.shields.io/static/v1?label=Run%20in&message=Google%20Colab&color=orange&logo=Google%20Cloud)](https://colab.research.google.com/github/atong01/conditional-flow-matching/blob/master/examples/2D_tutorials/tutorial_training_8_gaussians_to_moons.ipynb). Or install the more efficient code locally with these steps.

 TorchCFM is now on [pypi](https://pypi.org/project/torchcfm/)! You can install it with:

</code_context>
<issue_to_address>
**nitpick (typo):** Consider capitalizing "PyPI" to match the official project name.

The Python Package Index is conventionally written as “PyPI”; please update the link text to use this capitalization: `TorchCFM is now on [PyPI](https://pypi.org/project/torchcfm/)!`

```suggestion
TorchCFM is now on [PyPI](https://pypi.org/project/torchcfm/)! You can install it with:
```
</issue_to_address>

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[atong01]

LGTM thanks for the contribution!