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Fixes#42604.
## Bug
- [x] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)
## Bug
When trying to use app directory on Windows, the automatically created
`Layout.tsx` get's a lint problem for having a `<head>` element.
## Solution
Update the rule to check paths using `path.sep` rather than hardcoded
`/`
I also checked with `path.posix.sep` because some other rules was doing
that (both `path.sep` and `path.posix.sep`), so I'm just following
pattern
