Update CONTRIBUTING.md to include note about WSL (marimo-team#8140)

## Summary

<!--
Provide a concise summary of what this pull request is addressing.

If this PR closes any issues, list them here by number (e.g., Closes
marimo-team#123).
-->
Closes marimo-team#8123

## Description of Changes

<!--
Detail the specific changes made in this pull request. Explain the
problem addressed and how it was resolved. If applicable, provide before
and after comparisons, screenshots, or any relevant details to help
reviewers understand the changes easily.
-->

I have updated CONTRIBUTING.md to include a section for Windows
developers which recommends them to use WSL, and which points to
official documentation.

 <!-- I have read the CLA Document and I hereby sign the CLA--!>

---------

Co-authored-by: Akshay Agrawal <akshaykagrawal7@gmail.com>

Author: Ethan-Prunty

CONTRIBUTING.md

@@ -20,13 +20,13 @@ contribution._ Get in touch at
 or [on Discord](https://marimo.io/discord?ref=contributing).
 
 ## Setup
+_Note: We recommend that Windows developers use [WSL](https://learn.microsoft.com/en-us/windows/wsl/install) and clone the marimo repository [into the WSL environment and not the Windows mount](https://learn.microsoft.com/en-us/windows/wsl/filesystems)._
 
 Install [pixi](https://github.com/prefix-dev/pixi) to manage your development environment. The following command uses `pixi` to launch a development shell with all dependencies installed, using `hatch` as the environment manager.
 
 > [!NOTE]
 >
-> As an alternative to installing `pixi`, you can try developing in
-> [Gitpod](https://gitpod.io/#https://github.com/marimo-team/marimo).
+> As an alternative to installing `pixi`, you can try developing in [Gitpod](https://gitpod.io/#https://github.com/marimo-team/marimo).
 > Note that developing in Gitpod is not officially supported by the marimo team.
 
 ```bash