fix: build paths on use-auth-client

[pocesar]

Description

It's impossible to use @dfinity/use-auth-client right now because it points to a non-existing path, the package.json points to lib/(esm|cjs)/index.js

Checklist:

• My changes follow the guidelines in CONTRIBUTING.md.
• The title of this PR complies with Conventional Commits.
• I have edited the CHANGELOG accordingly.
• I have made corresponding changes to the documentation.

[sa-github-api]

Dear @pocesar,

In order to potentially merge your code in this open-source repository and therefore proceed with your contribution, we need to have your approval on DFINITY's CLA.

If you decide to agree with it, please visit this issue and read the instructions there. Once you have signed it, re-trigger the workflow on this PR to see if your code can be merged.

— The DFINITY Foundation