[Bug]: vendor/pestphp/pest/src/Plugins/Shard.php regex doesnt include modules/**/tests/ directories

### What Happened

When trying to generate the shards.json with pest --update-shards, it detects a different set of files than with pest --list-tests.

### How to Reproduce

run pest --update-shards with a module structure as described above

### Sample Repository

_No response_

### Pest Version

4.6.3

### PHP Version

8.5

### Operation System

macOS

### Notes

_No response_