fix: Correct typo in Windows instructions (#156)

Summary:
Changed "Donwload" to "Download" in the Windows installation section.

Pull Request resolved: #156

Reviewed By: SeaOtocinclus

Differential Revision: D69804336

Pulled By: georges-berenger

fbshipit-source-id: b7a64515e9f2e8940613ef6d4039e652fcced418

Author: CharlesCNorton

README.md

@@ -34,7 +34,7 @@ python -m pip install -e .
 ### Windows (via pixi):
 
 ```
-# Donwload pyvrs
+# Download pyvrs
 git clone https://github.com/facebookresearch/pyvrs.git
 cd pyvrs
 git submodule sync --recursive