docs: add s-thom as a contributor for code, content, and 3 more

[allcontributors[bot]]

Adds @s-thom as a contributor for code, content, doc, design, ideas.

This was requested by s-thom in this comment

[skip ci]

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated
ourflags-lgbt	✅ Ready (Inspect)	Visit Preview	Jan 11, 2023 at 11:05PM (UTC)

[s-thom]

@all-contributors please add @all-contributors for tool

[allcontributors[bot]]

@s-thom

I've put up a pull request to add @all-contributors! :tada: