Wrong default branch in github actions files

[Jayllyz]

According to the contribution guide :

zod/CONTRIBUTING.md

Line 3 in 3156cca

> ⚠ The default branch has just been switched to `main` from `master` (as of May 15th, 2024). Follow the following instructions to update your local fork.

main is now the default branch, so master needs to be replaced in workflows files.

see:

zod/.github/workflows/test.yml

Line 6 in 3156cca

- "master"

I can open a PR if needed.

[colinhacks]

Fixed, thanks!