What's Changed
* Fix incorrect variable usage in EMG example by mikeheddes in https://github.com/hyperdimensional-computing/torchhd/pull/136
* Add Hopfield and Attention memory models by mikeheddes in https://github.com/hyperdimensional-computing/torchhd/pull/134
**Full Changelog**: https://github.com/hyperdimensional-computing/torchhd/compare/v5.0.1...v5.1.0