fix typo in url

[Spice-Z]

Please select one of the following

• I am removing an existing difference between facebook/react-native and microsoft/react-native-macos 👍
• I am cherry-picking a change from Facebook's react-native into microsoft/react-native-macos 👍
• I am making a fix / change for the macOS implementation of react-native
• I am making a change required for Microsoft usage of react-native

Summary:

I just fixed typo in package.json.
I noticed this because I couldn't move to this repository from npm site's repository link.

Changelog:

[INTERNAL] [FIXED] - Fixed repository url typo

Test Plan:

[Saadnajmi]

Thanks for the PR! It looks like our CI checks are failing, so I might have to fix that before I can merge this.