This PR fixes your cursor when you hover some buttons in the docs site.
This makes them consistent with all other buttons.
### Change Type
- [x] `documentation` — Changes to the documentation only[^2]
[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version
### Test Plan
1. On the docs site, hover your cursor over the light/dark button.
2. Make sure that your cursor is a pointing finger.
### Release Notes
- Documentation: Fixed the wrong cursor showing when hovering some
buttons.
d2c51ae3ba
