`attw --pack` is incorrect for sub-pkg in monorepo

[zanminkian]

Reproduce:

0. Enable corepack
1. git clone https://github.com/zanminkian/fenge.git
2. pnpm i
3. npm pack ./packages/eslint-config && attw fenge-eslint-config-0.0.0.tgz print what I expected ✅.
4. attw --pack ./packages/eslint-config print information different from step 3 ❌.