[electrum] bump hidapi and remove --only-binary workaround

Summary: The latest version of hidapi specifies Cython<3 as a build requirement, which fixes the issue with the build script trying to use an incompatible (too recent) version of cython to compile hidapi.

Test Plan: contrib/build-linux/appimage/build.sh

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D17796