Make Spacedmonkey a maintainer of PHP

[spacedmonkey]

I wish to become a code maintainer of the PHP on the gutenberg plugin.

Description

How has this been tested?

Screenshots

Types of changes

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR.

[TimothyBJacobs]

@aduth unless GitHub has changed something since when we added me, I think @spacedmonkey also needs to be added to the @WordPress/gutenberg team for it to work.

[aduth]

@aduth unless GitHub has changed something since when we added me, I think @spacedmonkey also needs to be added to the @WordPress/gutenberg team for it to work.

Ah, right you are. @youknowriad , could you add @spacedmonkey as a member?

[aduth]

For posterity, the relevant reference:

The people you choose as code owners must have write permissions for the repository.

https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners

[youknowriad]

Added ✅ welcome to the repo